No. If a girl's not gonna be playing with your wiener, and your buddies wanna hang out, you pick the guys over the poontang that you won't be getting.
They were in bikinis, does that count?
EDIT: There are other exceptions, like the "one for one" exception where you can stand up a friend for a girl with no reason as many times as he's stood you up for a girl for no reason, without you yourself gaining douche points. There's also the "first date" exception, the "your plans are shitty and this girl has big tits" exception (note, two requirements, one exception), and the "I had plans with this girl for over two weeks and the plans you're trying to make kinda suck anyways" exception.