Solarpunk

I think that's an astute observation.

The idea of greater shared common space in a city appeals to me, though I'm very aware that it has to be abundant enough to meet demand even during high demand periods, and it has to be voluntary instead of just obligatory due to lack of facilities.

I set up a mailing list for my apartment building, and I find that there are some people who like the routine socializing that occurs, and others who really just want their solitude. I think before moving to kitchen space, I wish more apartments had a shared-use tool room, since this is something most people need at various times, though not nearly as often as kitchen space. I think it would need to have at least someone responsible for enforcing a shared expectation of cleanliness, though selected democratically so people don't feel beholden to this person or group.

I think shared kitchen space and exercise space would work well if social structure developed around their management. Something like, "I want to use the big kitchen next week since my family is coming over for Eid." "Have you been using the little kitchen lately? I think Davka requires folks to have used the little kitchen and cleaned up at least twice in the last month to schedule the big kitchen. Or you could get Raul to vouch for you, he uses the big kitchen every Friday."

Very true. An already bonded community is key to making that work. Headcanon was already established communities, so the bond would be present already. I believe that there will always be some conflict, but as long as people are not forced to live together (as in mentioned, a lack of money to afford something better), then most people will either learn to live with each other and share or find somewhere else where they are a better fit.

Would make for some interesting story points, the clashes of personality around these shared spaces.

The alcoholics win the fight by having more weaponry lol

You know, I can think of plenty of experiences where communal food halls were lively, fun affairs (either serving or attending), but never really realized the lack of festiveness in most restaurants. Maybe that's why I enjoy cooking at home more.

the isolating table arrangement

one thing that helps mitigate this somewhat is finding a place with long tables / bench seating (where multiple groups are forced to share a table) creating a slightly more communal atmosphere

Yet somehow people claim to love going to restaurants

there is a big cultural split in the approach to restaurants between Western and Eastern societies – US especially choose restaurants for “atmosphere” and “status” (“the place to be seen”) whereas Chinese choose their restaurants by how loud and busy they are (people enjoying good food make more noise)