Obviously it depends on the church and area, but I rarely experienced people trying to convert me when I was homeless. Most were trying to help the less fortunate and it ends at that. There was a church who would set up for lunch 3-4 days a week with no strings attached. A pastor came and delivered me MREs at like 2am in the morning one time after getting a call from one of his friends. He never once mentioned church. I'm thankful they were able to keep me alive in that dark time in my life.