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: a martial arts dojo. A bunch of goofballs wearing Japanese undies play fighting and smiling.
Offline: kink spaces. A bunch of goofballs in fancy undies play torturing and smiling.