Carmen's Gallery marks its 20th year with a gala celebration at the gallery, followed by a concert just down the street. All gallery artists have been invited to submit one new work especially designed for this anniversary exhibition, which will be displayed 10 a.m.-5 p.m. Tuesdays-Saturdays and 11 a.m.-3 p.m. Sundays, starting Saturday through Christmas. Meet the artists 11 a.m.-3 p.m. Sunday at the gallery or 4 p.m. Sunday at Bowen's Bar, where the New Orleans band the Iguanas plays its signature Tex-Mex rock and rhythm and blues driven by twin saxophones, guitar, accordion, bass and drums. Concert tickets are limited. Carmen's Gallery and Bowen's Bar are located on Dowell Road, Solomons. Exhibit, free; concert, $18 in advance or $20 at the door. 410-326-2549 or www.carmensgallery.com.


The Alexandria Harmonizers, a barbershop harmony chorus, will be featured in the Performing Arts Series presented by the Woman's Club of St. Mary's County. Since last year, the all-male vocal ensemble has grown to more than 100 members and has won the Society for the Preservation and Encouragement of Barbershop Quartet Singing in America's Eastern Division competition in Toronto, and will go on to participate in the international competition. They are three-time winners of the international competition. The group, which has existed since 1949, has performed at the Kennedy Center, Carnegie Hall and the White House. Reserved seating only. 8 p.m. Saturday. Great Mills High School auditorium, 21130 Great Mills Rd. $20; children, $15. 301-475-3225 or 301-475-9039.


The College of Southern Maryland Theatre Company brings Harold Hill to La Plata in the hit musical, "The Music Man," written by Meredith Willson. When Hill dupes a town into buying musical instruments and uniforms to form a marching band, but then insists on teaching the children with a sketchy "Think System," his credentials are questioned. Will he skip town or prove himself to the town and its beautiful spinster librarian? 8 p.m. Fridays and Saturdays, 2 p.m. Sundays, through Nov. 24. Fine Arts Center Theatre, College of Southern Maryland, La Plata campus, 8730 Mitchell Rd. $12; students, seniors and children, $10. 301-934-7828, 301-870-3008, 301-884-8131, Ext. 7828, 301-934-7788 (TDD) or www.csmd.events/finearts/index.

The Iguanas, a Tex-Mex band, and various artists including Stephan Harlan and his "After a Light Rain," above, are helping Carmen's Gallery celebrate its 20th anniversary in Solomons.