Sure, but how does hula-hooping poison the environment? As far as we can tell, the women doing the hula-hooping were doing it for fun/exercise with no sexual intent, and the men watching just thought it was entertaining and not sexual. Then Julie comes along and complains that it's like a strip joint!?
Now I wasn't there and I have nothing to do with github, but that is just my take on it. It just sounds like Julie has some very strange ideas about sexual harassment. It seems to be her that is causing sexual harassment in the workplace if anything.
The whole thing is very weird, and neither Julie nor the Github management look very good.