Zomg. I retired undefeated from Car Wars and Battletech at the ripe old age of 13. Curious to find my "peeps" in college, I attended one meeting of the "RPG club" where I found 8 dudes and a chick who were big into Vampire:Masquerade. Which was a game that got you beat up by D&D nerds. In 1992. I'm a pretty big nerd. I can walk the walk, talk the talk. I'm a member of LASFS, a group of gentle nerds that makes me feel like The Fonz I'm so cool compared to them. I think they'd kick the shit out of anyone LARPing V:M. It amazes me that game still exists. 
All over the place. That gender ratio sounds about spot-on too, bonus if the female was on the land-whale side. One of my besties really, really, really fucking enjoys LARPing. I don't really get it, at this point, at all. It seems like far too much work on her end to be any fun, and moreover, I have a lot of difficulty understanding the appeal of what is, essentially, total escapism. She even does a LARP where none of them have any super-powers, I guess it's like an SCA variant. At minimum, if I am going to pretend I'm a different person for several hours, I want some cool powers to throw around. I don't want to be gathering herbs in a garden for some other person's feast. I also wonder how one must feel about their life in general if one's favorite form of entertainment is, essentially, pretending that that life is not real by engaging in role-play in fantasy, alternate realities. However, love the gal, and she's pretty down to earth otherwise, and LARPing isn't hurting her, so who am I to pick on her recreational activities? They were certainly the outcasts of the outcasts and in general I wish them what is coming to them, including what is sure to be a lot of tooth and mouth pain. Hygiene was none of their strengths. I'm well rid of them.