As much as I want to be in keeping with the theme of the forum, and in that regard sure I'd stand back and enjoy the fight. But if this was an actual real life scenario then it would depend on the situation, if some girl has clearly instigated a fight and is getting her ass kicked, or both girls obviously want to fight then it's not really my business to get involved unless it gets out of hand. But if one woman is clearly assaulting another one or it's some sort of bullying, then it doesn't matter if I'm a stranger I should step in and do something about it regardless if it's women or guys involved.