Greater Cranberry Men’s Chorus, also known as The Bogmeisters, will perform at Mars Exploration Celebration Days Friday through Sunday at times to be announced and at 1 p.m. Saturday at Succop Nature Park, Penn Township, for the grand opening of the renovated T.W. Phillips barn.

The African Children’s Choir will perform at 9:30 and 11 a.m. Sunday at LifePointe Alliance Church, 997 Route 228, Mars. The program will feature children’s songs, traditional spirituals and gospel favorites as well as African dances. Admission is free, but donations will be accepted to support the choir’s programs. Visit www.africanchildrenschoir.com.

Lunchtime concerts, hosted by the Butler County Symphony Association, take place at noon Fridays, some in the symphony office at 259 S. Main St. and some in Diamond Park, opposite the Butler County Courthouse. Maeve Berry, classical piano, will perform June 7 in the symphony office. Admission is free. Call 724-283-1402 or visit www.butlersymphony.org.