This is *exactly* what I needed to hear. I never want her to feel crushed that I won't allow her space to have this close group of friends.
Do you think I should just kill any thoughts of bringing this up to her, and in particular what I mean by "bringing up" is "Honey, I am totally behind your girl trips and what they mean to you but I'm a little uncomfortable about the dancing with men and the other girls hooking up part."
I think from your response the best thing is to deal with whatever my own underlying insecurities are and not let on how it makes me anxious. I guess it's all in my head and I'd be better off keeping it that way?
Please let me know what you think and thanks again for the very helpful reponse. Happiness is for the brave, you're right after all.