More on Skepchick and Dawkins. I'm with Dawkins on this one.
Guys have to be bold enough to hit on girls that charm them. Bars are the worst places to do that, but there is no best place. Elevators? Well, I dunno, but the location is not the point. If guys wait for gals to do it, they might wait forever, and the human species ends.
If a gal doesn't want to be approached, she can wear a wedding ring, or a button that says "F-off." Or a facial expression that says the same thing. Don't try to look Lesbian - some guys will view that as a challenge unless you are butch and fat.
Read the piece. The comments are fun.