One of the main reasons people go to clubs and parties is to meet new people, so maybe she wants to keep her options open who knows?
I agree with Legend if she wants to go (without you) act like you don't care, but you should probably keep your options open as well I find it kind of hard to see a woman wanting to get started in the club scene unless it was to look around at what's out there, have fun and meet new people, etc.
By the way did anyone click on that picture link? If not don't do it trust me, fvcking sick nooberly bastard with 9 posts should tell you something!