from what i can tell the blonde was there with a bunch of guys and the brunette was there with her girl friend. I'll go with one of the guys with the blonde was hitting on the dark haired girl, the blonde didn't like it, so they went outside to fight. You can tell the blonde wanted to fight, so something pissed her off. The brunette's girlfriend is trying to talk her into leaving. Fortunate for us, she fails. Good fight!
