> Just suggest that because there are some male hackers that are uncomfortable around women that there should be man-only events. Let me know how that goes for you.

Either you completely misunderstand the issue and/or this is a straw man. It has nothing to do with comfort. It is the case that, because of institutional discrimination, women have a much higher mountain to climb as it were, to achieve success in the tech field. (If you dispute this, then you'll have to revise your reply to my other comment in which you acknowledge the existence of institutional discrimination.) Outreach to women, in this case, simply works towards helping them up that mountain a bit. The justification for that help is that for women the mountain is in fact higher than for men.

So, yeah, a man-only event doesn't make any sense. If you can demonstrate that men are at a net disadvantage in some way and could use help compared to other groups, then you could justify a man-only event.