Just a thought. Women have to work doubly hard to overcome these pre-conceptions and sexist expectations. It's a non-event. Trillith Fair, perhaps. The more a community splinters, the less effective they are in promoting their cause.
Art breeds art.
The more a cappella there is in general, the more opportunities exist for everyone. So those are my thoughts. To be frank, aside from putting on makeup before a show, I personally don't think about the fact that I'm a woman singing with 3 guys in The Bobs. It's not something I play up or focus on - it just doesn't occur to me.