There are all kinds of clubs out there depending on where you live and your interests. Even the rotary club is a way to connect and do good work while not being religious.

Check out the Unitarians

I would see if you have a Unitarian Universalist (UU) Congregation near you.

It IS technically a religion, but it doesn't feel like anyone is trying to make you believe anything, is aggressively LGBTQIA+ friendly, and is also welcoming to all races and cultures (it is literally in their commandments to respect people regardless of creed or views, and respect their individual search for truth and meaning).

While people there are incredibly nice, welcoming etc..the big downside is that most people at UU churches are usually older. It's got a lot of "old hippie" energy, which is great but they might have less younger people if you're looking for people in your age group. You won't really know until you visit your (hopefully) nearby congregation.

They do have traditional church services, with sitting at pews and singing hymns (a select hymnal with a lot of pagany hymns) and a sermon, but the sermon is always about philosophical things and thought provoking stuff, or more recently about current events. For example, when I went for my first time to a nearby church, the reverend spoke about her life growing up queer and everything the world did to make her feel like she didn't belong.

If you can give the church format a chance, I can't recommend it enough. A lot of the greatest most loving people I have met have been UU, and I still love and cherish them to this day.

Sorry if this is too churchy for what you are looking for. I would say if you're pretty liberal/leftist and you want to find groups that do/talk about stuff like that you can often find those connected to UU churches in some way and they'll never pressure you beyond "oh we hope you will stay, we love to have you" and things like that.

This is something of the intention of a unitarian church. They use largely judeo Christian imagery but they don't actually GAF what your beliefs are and are generally open to not necessarily debate but definitely exploration of non-judeo Christian theologies and / or philosophies.

Unitarian church

They do sermons by different people on different topics.

Team sports, volunteer work, social clubs, table top rpgs, choir or a band, basically any hobby you do offline in a group,...
Honestly the fact that you have to ask this question kinda shows how broken the society you live in is.
This is what's called a "third place". And they've been deliberately killed off or commercialized.

Check your local Unitarian Universalism (UU) branch.

https://www.uua.org/uuagovernance/committees/article-ii-study-commission/about-article-2

"Section C-2.1. Principles.

We, the member congregations of the Unitarian Universalist Association, covenant to affirm and promote

The inherent worth and dignity of every person;

Justice, equity and compassion in human relations;

Acceptance of one another and encouragement to spiritual growth in our congregations;

A free and responsible search for truth and meaning;

The right of conscience and the use of the democratic process within our congregations and in society at large;

The goal of world community with peace, liberty and justice for all;

Respect for the interdependent web of all existence of which we are a part."

If you are willing to risk a financially debilitating addiction to cardboard or minis, your local game store could fill that role. I have jokingly referred to my usually-weekly visit to my LGS as "nerd church," complete with the tithe of a few booster packs. You have to get lucky though because the quality of community can vary wildly. I am fortunate in that regard.

Dungeons and dragons

Birding. Get into birdwatching. Mediative closeness with nature. A realization of the whole. Everything is connected

I knew a Unitarian. He described going to church as more like a weekly potluck.

There are also local political clubs you could look into as they will be focused on local community issues.

You do not need to be a member to join events in most public University clubs.

Several of the local game shops have table space areas, and "game nights" open to newcomers. Euro-style table-top games and D&D / Pathfinder RPGs are usually casual.

Linux User Groups?

Live music performances often fill that void for me. It doesn't have to be a fancy orchestra or expensive venue, my town hosts free live music once a week. The music is nice because it gives you the opportunity to zone out and be introspective while surrounded by others. There is also usually a social scene before and after the set.

Yes, Quakers. They sit reflectively with one another instead of listening to services (generally speaking). Some don't consider themselves religious

Kinda random, but I've thought about joining a local non-church choir to meet people in a similar way.

Do you live in a city, and do you have hobbies? If you like stuff like anime, go to an anime con, it's great and how I know a huge amount of my friend group

I feel I should make a video about this. Online social media has made it very easy to find the 500 people across the whole world who think our frog picture is funny. It’s a lot harder to find 3 people in your town to have a drink with.

One simple idea; something I joined instead of initiating, is to make a WhatsApp group, put its QR code on a page (print at the library if you don’t have one) then put up the link anywhere you think people tend to walk. Explain it’s a social group for your given age demographic, but suggest it’s open to anyone. From there, suggest outings, get to know people, ask or offer small favors, etc.

I think that's a book club.

It's the genious of western social engineering that it is almost unthinkable.

It would require those third places, people who don't reject each other and an activity that is more fun than watching TV.

Halloween, beaches and (street) festivals, conventions, a gym and online games have a bit of it.

If that place would exist, people would change politics. But it can't because nobody can afford the space for people to do nothing.

The easiest would be to repurpose parts of a dying mall and turn it in a place for cosplayers to meet.

You could do Satanism but not actually worship Satan since he doesn't exist either but rather, I believe it is the Satanic Temple(look it up). Their credo is really good, like treat people equally and with kindness, that sort of thing. I think they formed to sort if troll Christians. Like if Christians were able to put a nativity in the capital, the temple would also apply to put something in the capital.

Anyway, another idea would be to join a maker space, if you like to use your hands.

Personally, I'm into cars so I joined a club and I race on weekends and go to car shows. I think anything that puts you on contact with like minded people will help you meet people to make friends. Good luck.

Unitarian Universalism. It is about common social values - you know, stuff like helping your neighbors and whatnot. You don't have to be a particular religion, just be decent.

Church without church is just a book club.

Highly recommend volunteer work, perhaps habitat for humanity? Volunteer organizations are typically very welcoming, and your surrounded by folks who are willing to give something back, instead of interested in your wallet.

Are you rural? In small to mid size cities the churches usually host socials not related to practice of their religion. Such as dances and pot lucks. Might be worth checking out the church calenders as a start. Churches are surprisingly social even for the un faithful. If its the right place. Sure you can face some annoying people but if faith is keeping you back from a visit on non worshiping day or event you can still connect with them for community.

E: have you tried church's for non religious gatherings? Its a thing.

Join a choir. Same connection.

You can usually find community and some cool people at local mutual aid groups, here's how to find those.

Hello and thank you for asking the question I have been waiting to answer.

I have been an atheist since I was eleven. At times, I have been viciously critical of organized religion. I have absolutely no tolerance for intolerance of people on the basis of skin colour, ability, or sexual orientation, identity, or preference.

My wife and I wanted to have a child, but we had no family and few friends in a new city. In any case, both my mother and mother-in-law have passed away. If our child was ever going to have much of a community, we knew we would have to build it.

Two years ago I started to go to church. I tried to pick carefully: I was not interested in hearing about how people are lowly sinners, that we need to be saved, that without big-G God we are all screwed, etc., etc. In my case, I settled on the United Church of Canada. I found a local ministry that had undertaken the process of becoming an Affirming Ministry - that is, a ministry that explicitly seeks to atone for past mistreatment of LGBTQ2S+ community members and explicitly welcomes their full participation. I sought this not because I am a member of that community, but because I consider it a sign of a genuine desire to be and do good on the part of the congregation. I am aware that the United Church was involved in residential schools and that the abuse of Indigenous People in such schools was horrible. The UC does not try to hide their involvement. They have apologized and are trying to make amends for the unforgivable things the church was party to - I think the effort to do better is sincere.

When I went to my first service, I was shaking. I brought a notepad and pen to write down all the awful stuff that I expected the Minister to say. People were friendly enough, but they didn't know I was ... an atheist. I thought that when they found out, they would chase me out with torches and pitchforks. I sat through the whole service waiting to hear the minister say something unforgivable so we could get up and leave.

So it's been two years and this is how it is going: I am an openly atheist member of my church community. I don't go every week, but I miss it when I don't go. Everyone was friendly, from the beginning. Nothing changed when I told them I was an atheist. No one has EVER tried to convert me: not the minister, not anybody. Other members of the congregation believe different things than I believe, but we don't get in each other's faces about it.

Mostly, we sing and talk about what it means to be a good person. Then we eat biscuits and drink coffee and chat. Religion has never come up outside of service.

Our minister says that god is love - and I think she might mean it literally. Sometimes I genuinely believe that what we are celebrating is nothing more than the idea of people loving each other, caring for each other, and striving to build a better world. We don't discuss sin or the afterlife. We welcome people of other faiths (and no faith) into our church.

A common theme at our church is the idea that Jesus has no hands but these (please imagine i am gesturing with my hands, and pointing at yours, etc). If the very mention of "Jesus" makes you cringe a little - I am right there with you. However, what I think they mean is that if people want to create a better world, we have to do the work. No one is coming to help us. Our church tries to do some of that good work: we sponsor refugees (currently a muslim family from Afghanistan who come to all the social events but rarely the service), we collect for the foodbank, do outreach to the elderly and disabled. We even organized a counter-protest when a hate group held a rally in our city. Church is a great way to find volunteer opportunities, if you are into that.

On the social side, our latest initiative is a games night. We also do movie screenings and play groups. We are trying to become, in some small way, a third place. You absolutely do NOT have to come to service to attend this events.

As for my family? They love it. It has become an important part of our social life. We know people in our community, and my son gets to meet all sorts - including our new friends who are elderly and disabled. I believe that a way to raise tolerant and empathic kids is to expose them to real diversity.

Not every church is like this, I know. The UC even has an atheist Minister (in Toronto, I believe) - that can't be common. Maybe your town doesn't have something like this. If you can't find this, you could try the Secular Humanist Association. I used to go to their weekly meetings - they never said anything cringe, but they also never did much in the way of helping the community. Also, they don't sing :(

Edit: i accidentally used a real name haha

If a hobby exists there's probably a local group for it

Things like hiking, biking, gardening are the most common

I go to a music school where I practice with a band for 90 minutes every Sunday.

I also host "sauna sundays" at my house during the colder months.

My partner for awhile played mahjong with a group every weekend at the local furry coffee shop and taproom.

There are so many ways to church without church, and arguably they're a hell of a lot better than religious indoctrination and reinforcement. Nobody needs that shit to love their neighbor.

Honestly, libraries can be. Big, you can visit whenever, they have weekly events and a community that you can get to know.

EDIT: But that's probably a profoundly obvious answer, sorry haha.

Men in sheds is now fairly international. It's primarily aimed is at retired or disadvantaged men. Most are not gender limiting however. They often do a lot of community outreach stuff too.

For younger demographics, makerspaces (aka hackspaces or hackerspaces) fill a similar role. You don't need to go in with any particular knowledge, just an attitude of making new friends.

Also, don't be afraid to use groups as jumping off points. Often members will be involved in other activities that might suit you better.

Sports clubs and hobby clubs for sure. In Australia we have clubs called Men's* Sheds that are for things like woodworking, but also a place to talk about mental health - things like loneliness. (*I don't think they're all so exclusively Men's sheds these days).

I play disc golf and that sometime feels like a church haha. Trying tk convince people it's an awesome sport amd get them to try it feels like trying to convert someone 😂

The Buddhist word for this is sangha or community of like minded individuals. Not necessarily to suggested a sangha but most are non denominational and not strictly religious as well as being kind welcoming individuals.

The core concept though is just finding the people you vibe with, or "your people." Try finding places that revolve around a hobby or interest of yours and you will likely find like-minded individuals.