/tg/ once made a spinoff chan but it wasn't exactly populated, just had dedicated users. While I do enjoy some of the fetish stuff on /tg/ I can see how people would want to talk about something, say goblins or amazons, dragons etc without opening that can of worms. I could try and think of some places to look at and return to see if they were successful. I'd suggest looking through subreddits first because they have largely replaced forums.>>570
Sometimes you can find them by typing in random keywords into your favorite search engine. Maybe even a specific phrase or two.