Being software engineers, I don't think we need to worry about pretty women in the workplace degrading our work performance. Hacker News itself is 94% male, according to the poll that was up a while ago. That's a ratio that goes unmatched at the nerdiest tech schools.
Sometimes it was hard to concetrate, but sometimes it was actually motivating. It brought the competitiveness out of me, and I actually was pretty productive, while i was not thinking about stuff.....
But the upside of the whole thing that I drank a lot of water, since the kitchen was on that way, and I got to upgrade my wardrobe to look good.
Since then, I started dressing much better.