At last years summer's Winners Camp workshop we played the MUVE Dancing Game (MDG) circle jump- which is played without any markings and can serve almost any sized group.
In 'Circle Jump', dancers form a circle and a dance leader jumps in the center. They are now the Muse, demonstrating a simple dance movement for the group to follow. After the Muse has explored different movement ideas that the group is emulating, they will hop back into the circle. The person to the left becomes the next Dance Leader and this continues until each dancer has had a turn leading.