I don't think there is anything wrong with appreciating and looking at attractive women, that isn't sexism. The problem here is marketing the event with "perks

I don't think there is anything wrong with appreciating and looking at attractive women, that isn't sexism. The problem here is marketing the event with "perks" that put women in a submissive position to men by default. Its not going to create an environment when female developers want to come hang out and hack, because it leads to those awkward "Are you a beer girl, are a coder?" conversations. FWIW you can totally look at attractive women while programming, without objectifying them at a hackathon -- that's what the Internet was made for.