Not Gencon, just the local Dundracon and what I think was or is now called Baycon. These are both from 96 or 97.
Female GM and her also female best friend are running us all through what I think was supposed to be Cyberpunk, but we were somehow in a fantasy world meeting cthulu like tentacle beasties... The two of them used the session to make all kinds of oddball sexual remarks along the lines of that scene in American Pie where the girl goes "And one time, in band camp, I..."
Gamer women know about as much about picking up men as gamer men do about picking up women... All if did was freak most of us out...
At another event, a demo of the Immortal RPG, again a female GM. She ran around the halls for the first ten minutes grabbing all the people she could find for her game. But she had about 20 of in there... too many to deal with. So we found ourselves stuck in mini groups and we'd get ignored for 30 minutes or more as she went off with this or that group, or grabbed this or that guy for some alone time in the hallways. I think I left midway through to go shopping. Another guy did that before me, and came back a half hour later to find she'd never noticed his absence.
I've only ever tried one other game at a con, and it was a Cyberpunk game where we just walked around a downtown area shooting undead things to try and break up some kind of ritual happening underneath one of the buildings. It wasn't bad, but it showed me the problems of the limited time format. I gathered I had a good GM from what I saw, but he had too much of a plot for the short time allowed.
So I don't really do cons anymore. The games aren't generally worth it, and the shops all charge retail, when I can get 10% off at the local store and even more online... So why bother?
When I go to industry cons I get hundreds of dollars in free software, full on corporate demos, private hospitality suites, and hot nekkid people dancing around in body paint (

), gaming cons just don't deliver...