I'm not sure when you were last here, but there's Forum Roleplay now.
Terraria Community Forums
Esther
Lingo
Deadass 5 years ago
Esther
Well, welcome back!
Streyll
Well, if you're talking about what I think you are, which would be what I think were called Social Groups, then yes. From what I remember the software that made them work couldn't be supported anymore, so eventually they were removed after a few forum updates. I wasn't around back then, so I don't fully know, but what I do know is that the current state of the RP section of the forums isn't what it used to be.
ppowersteef
Social groups have been removed since that time, as Xenfero didn't supported it anymore. Some populair Roleplays have been archived though
Lingo
I don't remember much about it but wanted to stroll down memory lane. That's a shame that it's gone.