how pissed off should i be?

[Jordan]

so my parents were in town for a midsemester break. my girlfriend went to canada partially for a change of scenery and have fun and partially to avoid my parents. while in canada she was at a club with a couple of friends (male friends if that matters). They were dancing with her, and she thought they'd have more fun if she left them alone to find other females to dance with. So she went to dance by herself. First off... how big of a mistake was that?

Two males sandwiched her in pretty forcefully. She was pretty uncomfortable, but she was unable to push them away. She said that screaming wouldn't have helped because it was so loud in the club. Then one of the males took her phone out of her back pocket and called himself (presumably to get her number). Then one (not sure if the same) of them put his hand down her pants and underwear. She was in complete shock and her only thought was to get away and take a shower because she immediately felt dirty, so she wiggled away and waved down one of her friends and they all left the club. I don't know why she couldn't do this immediately, maybe being completely violated gave her some extra strength.

This whole situation has me pretty pissed off, but I'm pretty convinced that she did nothing wrong and that these guys are just a bunch of sick perverted individuals. She wasn't even wearing "tease" clothes (jeans and a sweater) because it was cold (not that wearing those kind of clothes should be an invitation for this). She just wanted to dance. I don't really go to clubs; is this kind of conduct normal for clubs? I can't imagine it is, but then again I've been fairly sheltered.

I am kind of upset with her for not notifying a manager or at least punching/slapping them in the face. What kind of laws are out there regarding this kind of stuff? What are the chances having their number can bring any sort of justice?