Sept. 3 & 17. Jam sessions open to all interested musicians to work on jigs, reels, and waltzes to have fun, learn tunes, and develop contra dance musician skills. Bring the Ruffwater Fakebook, the Portland Collection, and waltz books if you have them. 3–5:30 p.m., Pittsfield Union Grange, 3337 Ann Arbor-Saline Rd. Mask, proof of vaccination, and liability release required. Free. 709-8748, aactmad.org.