Lots of them already do. I live in a small town and my library has 2 conference rooms and a room where book readings take place. Loud activities happening throughout the day not interrupting people in the quiet areas.
Eh fair. Still to me this is just a weird idea. It's like the top comment suggested it looks like OP is trying to think of a coffee shop. That's a good place to be social if you don't want to go to clubs and shit like that.
Yeah there are massively better options and every time I've seen a similar conversation happen and a librarian shows up they have a million good reasons why libraries shouldn't be social hubs. I just thought I'd be a bit cheeky.