Bars are notable for staying open late, but I’m not really familiar with alternatives that might operate similarly. I think many cafés (at least around my area) tend to close a few hours earlier by comparison, which would be my go-to for an alternative otherwise, so what other options are there?
Clubs. Activites. Local Theater. Rehearsals go to something like 10 pm quite often. They are social, fun, and you have a common goal. Drinking is not allowed.