I came here looking for the standard, oblivious, "Hey, what's so sexist about being completely sexist?" comment.
As usual, HN did not disappoint.
So let me explain:
"Women" are not a perk. Women are humans with as much value to contribute to software development as men. To list them as a "perk" and to relegate them to a service role minimizes women in two ways beyond the obvious, gross objectification:
First, by saying "hey, all women are good for at this event is serving beer."
Second, and much more toxic, listing women as a perk reveals the unspoken understanding that heterosexual males are the intended audience for the event and that anyone else is secondary.
> I think if anything it offends programmers.
But yeah, by all means, muster up some indignation for all the poor, privileged, over-represented men who should be offended by this.