I've just come back from co-running my conference last week. We were way up on female attendance and speakers compared to last year, which I'm really glad with. Women don't need discounted tickets to decide whether or not to come to a con. They definitely don't need their own colour lanyards and if they had one it doesn't need to be pink.
Most importantly, what women need are reasons to come, not discounts. We're limited in what we can do at 44CON[1] to change the sausagefest nature of the industry by the number of women, but we're happy to help where we can. We should focus on improving the conference experience for women (and everyone) so they'll tell their colleagues and friends in industry to come along. Women buy tickets too, is it so hard to listen to customers instead of singling them out?