If you find yourself in a group of silent, bald, and blue guys, chances are you're either in a men's support group, or seeing the Blue Man Group.
We can't vouch for the success of the support group, which Arrested Development character Tobias Fünke famously attended. But the BMG has been wildly successful since it's 1987 inception. (Fünke also entertained the delusional possibility of being called upon to stand-in for the pantomime group.)
And, despite their speechlessness, Blue Man Group's show is anything but silent, incorporating a dizzying display of percussion, multimedia and comedy.