I go out down there once every two months or so. The key is to know your surroundings and avoid dangerous situations. To me it would depend on how large the gash in the girls foot was. If it is going to heal on it's own then just go the opposite direction. There is no point in trying to talk trash to a group of drunken losers. If the gash is large and your girl needs medical assistance then call the police and have them pick up the one responsible. He is probably never going to end up paying for the medical bills but chances are the guy has priors and an assault charge might be enough to put him away for a year or so.

Whenever you are in a situation like this you have to remember that you probably have more to lose then they do. Confronting the group on your own will do you no good.