You're forgetting that they pressured her to do it. So, socially pressure someone into doing something sexually submissive = she's fair game to go further?
She should of just gotten up from the bar. From how the story reads, I don't think she was laying down at that point so she had the opportunity to walk away. 4 separate acts happened and by her account 3 were unwanted. How many does it take for someone to just remove themselves from the situation? How many?
They physically assaulted her and pinned her down on the bar? What I have read translates to her being an independent woman who voluntarily rolled her shirt up and decided to climb on the bar.