LYING ON HIS back on the smooth wood floor, a man lifts his legs, knees bent. Another dancer places the man's feet solidly on her hips. Grasping her hands, the man slowly pushes his legs up, steadying his partner before letting go. She balances in the air for a moment, arms outstretched, before slowing tilting back toward the floor, where the two spring apart like acrobats at the circus.

And that's just a warm-up.

Welcome to the Washington D.C. Contact Improvisation Jam, a dance event held Sundays from 11:30 to 2 at George Washington University's Marvin Center.