“Ruthless! The Musical” presented by Stumptown Stages. Aspiring 8-year-old actress Tina Denmark will do anything to play Pippi Longstocking in the school musical, including murdering the leading lady in this satirical musical. 7:30 p.m. March 6-7; 2 p.m. March 7-8. Brunish Theatre, 1111 S.W. Broadway, Portland; $33.65 to $43.65, $29.65 for students and seniors. 800-273-1530 or www.stumptownstages.org
“Three Men on a Horse” presented by Lakewood Theatre Company. In the 1930s, Erwin, a greeting card writer, possesses the ability to pick winning horses at the race track, but he never gambles, until small-time gamblers Patsy and Mabel discover his gift. March 6 through April 12; 7:30 p.m. Thursdays-Saturdays, March 18, April 1; 7 p.m. March 8, 15, 22; 2 p.m. March 15, 22, 29, April 12. Lakewood Center of the Arts, 368 S. State St., Lake Oswego, Ore.; $32, $30 for seniors. 503-635-3901 or www.lakewood-center.org
“Threesome” presented by Portland Center Stage. Egyptian-Americans Leila and Rashid attempt to solve their relationship issues by inviting a stranger into their bedroom. The comic and awkward evening raises issues of secrets, sexism, independence. Contains nudity, mature language and content. 7:30 p.m. March 6-7; 2 p.m. March 7-8. Ellyn Bye Studio at the Armory, 128 N.W. 11th Ave., Portland; $35 to $55; $25 for students. 503-445-3700 or www.pcs.org
“Tribes” presented by Artists Repertory Theatre. Billy, the only deaf member of his competitive, academic family, has never learned to sign. He meets Sylvia, a woman raised by deaf parents who’s also losing her hearing, and they fall in love. But Billy’s family is less than receptive. 2 and 7:30 p.m. March 7; 2 p.m. March 8. Alder Stage, 1516 S.W. Alder St., Portland; $41 to $46; $25 for students. 503-241-1278 or www.artistsrep.org