Butler Senior High School's music department presents a free concert at 7:30 p.m. Wednesday in the senior high auditorium. Groups scheduled to perform include the Concert Choir, Chanticleer Singers and Girls' Ensemble. Admission is free but donations will be accepted. Call 724-214-3200, Ext. 5229.

<B>Allegheny RiverStone Center for the Arts</B> hosts a performance by Walt Strony on the Wurlitzer theater organ at 7 p.m. Saturday at Lincoln Hall, 92 S. Palmer St., Foxburg. Strony made his public debut in 1974 at age 18 and has performed hundreds of concerts worldwide. Tickets are $10 for adults and $5 for students. Call 412-867-1816 or visit www.alleghenyriverstone.org.