I joined a private forum in May.
It has 125 vetted people. Invitation only.
General discussion. It’s wonderful.
Full disclosure: I couldn’t recruit anybody if I wanted to, as I don’t control the invitations.
I am also considering a martial arts forum.
I used to post on NDN but found their board moderators to be oppressive and obnoxious.
Social media, like Facebook, Discord, Reddit, X and substack. The last 2 are not peer-to-peer topic type, so may not be counted as forum.
Technically I’m in 2 platforms. Here and Nextdoor. Because my neighborhood uses Nextdoor and I’m a community supporter.
I’m also the unpaid treasurer of my HOA. So I have to be in Nextdoor. But we’re a small-scope small-size HOA. My responsibility is small and HOA fee is small, only covers property tax, insurance and landscaping of a pocket park and a children playground as well as upkeep of a retention pond for stormwater. Our park is very beautiful where we have annual cookout and in old days(before we moved in) they had summer movie nights there.