Founded in 2000,  this group has struggled with ways to describe itself — a sing-along string band, a jam session with singing, a string and sing gang, a folk country musicale — but whatever it is, it’s a pack of fun. Gatherings are open to the public and prospective members and visitors are encouraged to attend. Inquiries are welcome. Bring yourself and your instruments of choice or just hang around and use your voice. Tune Circle begins at 6:00 p.m.; Song Circle at 7:30.