does anyone know of any other decent forums / chat sites...?
depends on what for?
ones were you can meet new people unlike facebook were you only really talk to people u already know...
There are many forums you could join. Are you talking specifically sex forums or any?
You could search for a forum on google for a particular kind of hobby or activity.
There are plenty of adult forums available, just do a search on google. But I cant say I know of any myself other than Fetlife and I know a few on here are active on there 