“W e always thought BalletBoyz was a really stupid name. We wanted not to be BalletBoyz .” says William Trevitt, founder of the company called, guess what, BalletBoyz. It was the BBC that landed them with that tag, when then-Royal Ballet dancers Trevitt and Michael Nunn made a cheeky and revealing backstage documentary at London’s Royal Opera House. Their knockabout, laddish charm won them fans, and when they went on to found their own company, first the two of them, later expanded to 10 men, the name stuck. It does carry a slight hint of the Chippendales about it. “We had a theatre manager coming and saying: ‘Could you ask the dancers to take their shirts off in the second act?’” remembers Trevitt. Which may say something about the expectations of a group of men dancing. BalletBoyz is heading out on tour this month to celebrate its 25th anniversary.…