Of course if you were in England that wouldn't apply because coffee bars don't have Public Entertainment Licences, so it's illegal making music in them these days.

Wherever you are, the things is to keep playing together for its own sake. That way you get better, and anyway it's fun. Maybe you could try for weddings and christenings and that kind of stuff, the kind of events where people of different generations are all together, and a bit of live music would be appreciated.