Excluding, say, here or the fediverse more broadly.
There have been some nice corners of the internet that have somehow kept going along their way that I've enjoyed lurking around like some alien observer. They are the few spaces I dare not pop in and ask, out of fear it would somehow break things.
Offline, go to any jam band concert like dead & co, dopapod, the werks, or dark star orchestra or glitchy bass music concert like Mersiv, Tipper, detox unit, or 3AM. even better, go to a small music festival held on private land (no law enforcement)
I saw the barter system in action, folks just giving away Hallucinogens and pretty rocks, lots of sharing and hugs and general positivity. Even saw one of the homies having an impromptu magic the gathering match on a big flat rock next to a river. They both just happened to bring their decks to the festival.