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?
24-hour coffee shops
24-hour diners, though they can get a little interesting at night. Do not underestimate a waffle House at 3:00 in the morning
24-hour libraries: these are rare
24-hour restaurants like burrito places.
Really depends what you want to do, do you want to just chill, or do you want to hang out with friends, or do you want to eat, there’s a lot of options.
Unfortunately 24 hour libraries, or even late night, are pretty much non-existent now because 1) parents use them as babysitters and 2) nothing against homeless people but librarians aren’t equipped or staffed to take care of them appropriately.
And now with the book bans librarians are in short supply too, which means shorter hours and even fully closing on some weekdays.
Support your local library, everyone! See if there’s a “friends of” group. It’s a great way to connect with your community.