This concept is the "third space" -- a social space other than work and home where people can congregate, socialize, and relax. Parks and libraries are some of the only remaining spaces in capitalism where people can be humans without paying for the privilege to exist by the minute.

My local library closes before night time, so I'm on board with the idea of them a library closing late at night.

I don't even need to talk to others, just seeing people there would soothe me and ease loneliness I get from not socialising much.

I miss that about college, 24 hour library filled with people. You have to be quiet on the main floors but upstairs was less strict.

The routine of get a coffee, study for a while, go pee and step outside with some friends for a smoke, and grab another coffee on the way in. Rinse and repeat until the sun comes up.

But then homeless people would have a warm safe place to stay! /s

I would love this. Like another commenter said, after 10 the no talking rule gets rescinded and it turns into a cafe level of speech.

I’d love to just read books with my wife at a library late at night.

This is a cool idea, but would significantly increase staffing needs. Where are you going to find librarians who want to work night shift?

Try kava bars. YMMV depending on your location but here in Florida, there are many that are open late where people just hang out, watch movies, play pool, videogames, read, work, etc and they're usually not loud or crowded and they don't serve alcohol

Some libraries, like Austin's Central Library, are centered around that idea.

Americans reinventing coffee houses that aren't Starbucks be like: