There are muffin and coffee shops, burger places, donut places, convenience stores with food. I would think you can find where you can sit and share with someone while treating him or her to something. Otherwise, buy it and maybe find a place to picnic, which is in some nice fresh air, possibly. There is nothing wrong with eating in the fresh air.
Each homeless person is different. And my general impression is a homeless person needs to be able to do the things to get off the street . . . while you are a friend but not taking responsibility for getting the person housed and keeping someone there.
And get to know Christians and see who is mature and good for you, and see what those people are doing and you can join with them.
However, make sure you know what you are doing, with leaders and church members, also. Church culture people can have major issues, right while they can seem very active in helping the homeless.
And there are Christians who are working in homeless and recovery services. You can get to know them so you know who is ready to help a homeless person . . . who is ready.
And if you can find a genuine minister who is a native of where he or she, or the couple, is ministering and helping people, you can send a regular check to help that. I mean, a native missionary can be good, who has grown up in the area of ministry and knows the language. I have a couple like this. It's fun.
And you could be the one to start something. Like, where I was for a while, I think on Thursdays a van would just show up at a park in the evening and meet with homeless and give out sandwiches and blankets and clothes. And we would talk and have a good time. They weren't rescuing anyone, but they fit in fine at that time on Thursday evenings.
And a guy would minister and give handouts, out of his car trunk. He would just park by the street in pretty much the same area, whenever he came. I don't remember if he had a schedule or just came whenever. It does not take much to find a few blankets and clothes and make some sandwiches and include some fruit, maybe.