Just the opposite. SF (and Silicon Valley) has the highest ratio of single straight men to single straight women in the country. It's a very, very difficult place to date as a straight man.

And the abundance of male techy immigrants means that women who are attracted to geeky men are the most in demand and most likely to be already taken.

If you're single (and male) and you'd like to be paired up, make it happen before or after your time in SF.