Contact Improv
Contact (for short) is an improvisational dance form that has little structure. It can have many feels to it from silly to sensual to playful to rowdy to spiritual. A (the?) basic concept is maintaining contact and sharing some weight. Contact often incorporates lifts and tumbling/rolling.
There is a weekly contact jam (dance open to anyone) in the Dance Spree space in Northampton, MA, USA at 8:30 on Wednesdays.
There are also two monthly contact jams at Earthdance