Management at the location is responsible for breaking up the fight, they're responsible for all patron's safety while they are on the premises.
It makes me sick to see male employees standing around not doing anything to prevent the attack. Being a former store manager (not in the fast food environment) I dealt with a lot of teens and early 20 year olds and their B.S. Always sided with my employees, but there was never an altercation in the work place, because my employees knew that they would get canned on the spot. Always told them to take it up with whoever after work, off the premises.
If I were a patron in the store, I would have definitely attempted to break it up. If the girls turned their aggression toward me, then yeah I probably draw on them. Until that happens, all you can do is try to separate them from the girl.
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