At forums about other franchises, there are such sections. There, the thread opener pretends to be a fictional character (preferably from the franchise the forum focuses on) and the other posters ask him questions.
I'll admit it's both laziness and also just being hands-off with this forum because I've been blessed with overall a userbase that self-regulates just fine. So I opened an RP section, but no rules. Open to you guys determining and discussing how it should work, or just setting up rules on each thread individually, dunno.