Note that Comiket, the biggest dojinshi (amateur zines) market in Japan that attracts over a half million attendees semiyearly, has a larger percentage of female exhibitor attendants than males. The notion that anime/otaku culture is overwhelmingly occupied by males is patently false.
Yeah, my experience with anime clubs and events is that females are the majority about as often as males. It's a stark contrast with the sausage fest that is computer programming activities.
That's true. I once attended Comiket on day 2 and it was quite shocking that at least 90% of attendees on that specific day were women. This would never happen at any western comic convention.