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?
Echoing the outside thing. I love to sit on a deck chatting with friends on a warm summer night. There are some biking trails with minimal street crossings nearby that make for a great late night stress-relief ride with or without a friend. I have met a lot of snowboard/stoner/skater bros late at night on trails. Find an abandoned bridge or other public infrastructure and watch the stars while munching on some 24h takeout.