Not a lot, aside from a thing that was by pure chance at summer camp. Now, here's what happened, it seemed there were a bunch of my friends dressed up as various ponies from Friendship is Magic. Of course I was the odd one out as Captain Rex from Star Wars: The Clone Wars. That was a fun day indeed.
Oh, never mind, just remembered that you said 18 and up. What little role play I do is with my friends, and is pretty much Star Wars, since that is the fandom that most of my OCs are.