What does the San Francisco Ballet do with a cast of a hundred kids in between matinee and evening Nutcracker performances? They get sent off to “Club Nut” which sounds like one of those slumber parties where no one sleeps. The kids hang out in a large studio in the SF Ballet building with free food, craft projects, Christmas videos, cards, Twister, and volunteer adult chaperones. At the appropriate time the young performers are escorted across the street to the Opera House to get in costume and wait for their cues.