What if you could go somewhere, like a library, but not a library, and pull out an old World Book encyclopedia and look up the capital of Moldova? Then spend an hour just browsing through the thing, like I did often when I was a kid? $10/month, new books added weekly.
You could read books there. There could be a magazine section, like there used to be.
It sounds retro, and it is, but who would have thought records would make a comeback? I think in the right market, with the right marketing, this would work, and perhaps work really well. You could ask everyone to check their phones at the door. I think even the kids are starting to understand their addiction is unhealthy.
Free coffee–how about an espresso machine people could operate themselves, with training?–meeting areas for people to hang out and talk. Bean bag chairs. Place to do old school homework, with unconnected computers running word processing software. Maybe even old software, barely better than the Atari games which might also be present. Maybe even a typewriter or two.
A working pay phone. Etc.