Harmony in the House will feature American folk music by The Early Mays at 7 p.m. Friday at Bottlebrush: A Gallery for the Arts, 539 Main St. Tickets are $10. Call 724-452-0539 or send e-mail to HITH@zoominternet.net.

Allegheny RiverStone Center for the Arts hosts a performance of the Pittsburgh Symphony Orchestra Brass Ensemble at 2 p.m. Saturday at the Episcopal Memorial Church of Our Father, Route 58 near Foxburg. Tickets are $25 for adults and $10 for students; call 412-867-1816 or visit www.alleghenyriverstone.org.Kean Theatre, 5847 Meridian Road, Gibsonia, presents Johnny Angel and the Halos Christmas concert at 8 p.m. Friday and Saturday. Cost is $33. A pre-show dinner also is available. Call 724-444-5326 or visit www.KeanTheatre.com.