Open to adults and teens, all instrumentalists and vocalists welcome. These jams are fun, spontaneous, and a great way to experiment with new techniques and skills in the company of fellow musicians. Amps, pianos, drums, PA system provided. Winchester Community Music School, 407 Highland Avenue, Winchester. $7 for participants, spectators free. Open to the public. For more information, call 781-721-2950 or visit www.winchestermusic.org.