I don't understand the hangup, personally. At least, not amongst my like-minded peers; the cultural/religious sticking point makes sense, even if it's rather dumb. Hell, I've tried to have a b-day party at a nudist beach before, but absolutely nobody else was willing to do it (and yes, I made an effort to invite a number of my guy friends).
At the very least, I see no reason why women can't go around shirtless if they choose to do so.