Butler Little Theatre, One Howard St., is staging "Murder at the Howard Johnson's" at 7:30 p.m. tonight and at 8:15 p.m. Friday and Saturday. Tickets are $10. Call 724-287-6781 between 7 and 9 p.m. or visit the Web site, www.bltgroup.org.

Comtra Theatre, Route 19 in Cranberry Township, is staging the musical "Once Upon a Mattress" through Oct. 18 at the theater on Route 19. Curtain is at 7:30 p.m. Fridays and Saturdays. Admission is $12 for plays and $15 for musicals. Box office opens at 6:45 p.m. the day of the show. Call 724-773-9896.

<B>The Backstage Bar and Cabaret at Theater Square</B>, a project of The Pittsburgh Cultural Trust, in Theater Square at 655 Penn Ave., is staging "I Love You, You're Perfect, Now Change, through Feb. 1 at the CLO Cabaret, 655 Penn Ave. Performances start at 7:30 p.m. Wednesdays through Saturdays, at 2 p.m. Saturdays and Sundays and at 1 p.m. select Thursdays, except some holiday dates in November, December and January. Tickets are $39.50 for evenings or $34.50 for matinees. Call 412-456-6666 or visit the Web site, CLOcabaret.com.<B>Pittsburgh Public Theater</B> presents August Wilson's "Radio Golf," set in 1997 Pittsburgh, through Nov. 2 in the O'Reilly Theater in downtown Pittsburgh. Tickets range from $35.50 to $55.50. Students and age 26 and younger pay $15.50. Call 412-316-1600 or visit the Web site, www.ppt.org.