AS220 was originally conceived as an open gallery where anyone could have a one-person show for the asking. Not sure how it works now but I doubt its core tenet had changed.

It has a cafe/bar. Just go check it out and ask. I'm sure the website has info too.

There are also gallery-like spaces. I once had a one-person show for a month at a bookstore / cafe space. Some banks also offer gallery space.

Good luck!