When the Ballet Boyz became Dadz
Lippy, brash and unshaven, the Ballet Boyz were a dance phenomenon. Now, as they enter their 40s, they're launching their boldest venture yetMichael Nunn has just made an unsettling discovery. He has been teaching ballet to eight restless young men in a sweaty London rehearsal studio " and, he says, "I've turned into the monster I ­always hated." He demonstrates his teaching manner: stiff-necked, steely…