There's a lot of reasons to move to LA / Santa Monica, but I'd say for the women isn't one of them. The girls in NY are much friendlier, probably due to the fact that they outnumber men and most of them aren't from NY.

In LA the men still outnumber the women (all you need to do is walk into a crowded bar to see this - it's almost as bad as SF, though not quite) and most of the women are originally from southern CA. Take that as you will.

Having said all that, if you're married/relationshipped/gay?, you can't really beat it if you can afford it!