“Songswap,” informal song-circle format. Bring a song, a friend, and an instrument. Open to all. Free. Camden Public Library, 55 Main St, Camden. camden.lib.me.us. 6:30 to 8:30 p.m., Thursday.
Bon Voyage Fiddlin’ Jay Smith Concert, fiddle, bluegrass, $12; $8; 10 and under free. Nordica Auditorium, Merrill Hall, University of Maine at Farmington, 224 Main St., Farmington. 7 p.m. Saturday
Bluezberry Jam, an eclectic mix of blues, jazz, rhythm and jam, $10. New Gloucester Congregational Church, 19 Gloucester Hill Road, New Gloucester. 7:30 p.m. Saturday.
Potty Mouth, indie-rock punk, $8; 18-plus. Space Gallery, 538 Congress St., Portland. space538.org. 8 p.m. Saturday.
Shape Note Singing, This singing tradition, also known as Sacred Harp, features exciting harmonies and warm fellowship. This is a participatory event and everyone is welcome. The New Church, 302 Stevens Ave., Portland. maineshapenotesinging.com. 1 to 4 p.m., Sunday.
Family Folk Festival: The Gawlers and the Boardmans, a fun- filled concert of Downeast, Celtic, and Quebecois folk music filled with fabulous guitar and banjo picking, fiddling and singing, $10; $5 students; 12 and under free. Jewett Hall Auditorium, University of Maine at Augusta, 46 University Drive, Augusta. concertsatjewett.com. 2 p.m. Sunday.
Hot Tuna Acoustic, Jorma Kaukonen, Jack Casady and mandolin virtuoso Barry Mitterhoff, $30/advance; $35/day of show, Boothbay Opera House, 86 Townsend Ave., Boothbay Harbor. boothbayoperahouse.com. 7:30 p.m. Sunday.
Shanna Underwood, Gather Restaurant, 189 Main St., Yarmouth. gathermaine.com. 6:30 p.m. Wednesday.
Trigger Hippy, featuring Joan Osborne, Jackie Greene and Steve Gorman, $20 advance; $25 day of show; $40 preferred seating; 18-plus. Port City Music Hall, 504 Congress St., Portland. portcitymusichall.com. 8 p.m. Jan. 9.
Action Packed Thursday: Beer Pong, Line Dancing, Karaoke & DJ B-Set, , $3 after 10 p.m.; 21-plus. Club Texas, 150 Center St, Auburn. clubtexas.info. 6 p.m. Thursday.
Okbari with bellydancers, Blue, 650 Congress St., Portland. portcityblue.com. 8 p.m. Friday.
Ian Fitzsgerald, singer-songwriter, Blue, 650 Congress St., Portland. portcityblue.com. 6 p.m. Friday.
The Evan King Group, soul, jazz, Blue, 650 Congress St., Portland. portcityblue.com. 10 p.m. Friday.
Robbie Neeb Trio, jazz, Blue, 650 Congress St., Portland. portcityblue.com. 6 p.m. Saturday.
Chris Klaxton Trio, jazz, Blue, 650 Congress St., Portland. portcityblue.com. 8 p.m. Saturday.
Mike Beling Trio, jazz, Blue, 650 Congress St., Portland. portcityblue.com. 10 p.m. Saturday.
Pete Witham, singer-songwriter, rockabilly and roots, Blue, 650 Congress St., Portland. portcityblue.com. 8 p.m. Tuesday.
Irish Seisiun, Blue, 650 Congress St., Portland. portcityblue.com. 7 p.m. Wednesday.
Rap Night hosted by Ill by Instinct, $3; ladies are free. Asylum, 121 Center St., Portland. portlandasylum.com. 9 p.m. Wednesday.