While you may agree with this particular case of discrimination it is not a good idea to open an opportunity for more discrimination in the future - keep in mind it may not always be the type you agree with.

I think this sort of slippery slope argument is a cop out. I agree, there are plenty of situations where discrimination based on gender would not provide a substantive benefit to society. For example, a women’s only supermarket would be ridiculous. This conversation, and the article, is specifically discussing the realm of art exhibitions, and a marginalised groups right to have an exhibit be an exclusive place. I am a woman, and you’re right that it does give me a bias here. As an example though, I’m white, and I would be perfectly okay being excluded from an exhibit that was set aside for Indigenous Australians. I think the cultural significance of art can be really important, while also generally not causing a person harm to miss out on.

They also only allow women patrons, so men are not charged for a service that is not equally provided.

In the example I just gave I’d personally be fine paying regardless for say, the admission to a whole gallery with just one exhibit inaccessible to me. I do see how this could be a problem though. Would it be a good enough resolution then, if that was a seperate ticket than the general admission? What if that exhibit ticket was then free though? Free as in, for anyone of that group even without a gallery ticket.