I know at least one objectivist girl. She was in my Chemistry class freshman year. (She was actually a high school senior doing joint enrollment at Georgia tech. She is a student at Agnes Scott now.) She was normally in a different lab section but when she missed one lab she made it up with our section and was my partner for one lab. She also went to GHP at the same time I did and I vaguely remembered seeing her there once, but we did not actually spoke until the second week of college. She is rather physically attractive (maybe an 8 out of 10, well above most girls at Georgia Tech), but has a horrible personality.
She is actually the only person I've ever met in real life who openly claimed to be an objectivist. From her facebook profile you can clearly see she treats Rand's philosophy like a religion.
I do know several people who claim Ayn Rand's books are among their favorites though, and more than half of them are girls. (However, I know that one girl I knew from my highschool who likes Rand's books, and is about equally good looking with an equally bad personality, is practically a Marxist.) I was surprised to see that one girl from my church had Ayn Rand (as well as Dan Brown

) listed among her favorite books on facebook. (She is actually the younger sister of another girl from my church whom I've been thinking of asking out, although there is very little resemblance between the two. I don't know her very well, but she seemed very outgoing and assertive, especially considering she is a middle child, diametrically opposed to her big sister. She is probably a bit better looking that her sister, but I don't think our personalities are nearly as compatible.)
From what I've read online, Objectivist women tend to be as hot as they are rare, quite unlike their male counterparts. The same may be true of Libertarians. The only self-described (Christian-)Anarcho-Capitalist I've ever met in real life is quite possibly the most attractive girl I know (and quite unlike the objectivist girls has a personality that may be even better than her looks).