Musical Theatre Guild is staging “The Rocky Horror Show” at 8 p.m. today and Sunday and at 8 and 11 p.m. Friday and Saturday at the William A. Lehnerd Performance Hall in the MTG Production Center in Memorial Park. Tickets are $17 and available at May's Music Shoppe, 247 E. Jefferson St., or by calling 724-283-5811.

Comtra Theatre, Route 19 in Cranberry Township, presents “Harps and Harmonicas.” Curtain is at 7:30 p.m. Friday and Saturday. Tickets are $15. Call 724-773-9896.

<B>“Good Times,”</B> a musical revue by Winnie Flynn of Seven Fields, begins at 8 p.m. Friday and Saturday and 2 p.m. Sunday at Cumberland Woods Village in North Hills UPMC Senior Communities, Allison Park. Tickets are $20 in advance by calling 412-394-3353. Call 412-635-8080 for tickets on the day of the performance. Tickets are $25 at the door.

<B>Pittsburgh Musical Theater’s</B> student production of the Cold War rock opera “Chess” will feature Lyric Ackelson of Butler in the role of Svetlana at 7:30 p.m. today through Saturday and 2 p.m. Sunday at the Byham Theater, 101 Sixth St. Tickets are $25.25 for adults and $15.25 for students and available at 412-456-6666.