The Bach Society, directed by David Mruk, will present its concert “Alleluia” Friday and Saturday. The community choral group will sing arrangements of “Alleluia” by various composers and selections from the work, “A New Creation,” by Rene Clausen. The program also will feature lighter pieces such as “Old Horatius Had a Farm,” “When the Saints Go Marching In,” “I Got Shoes” and “Zum Gali (Dance the Hora!).” The Friday concert will be at Center Presbyterian Church in Slippery Rock, and the Saturday concert at Tower Presbyterian Church in Grove City. Both will begin at 8 p.m. Admission is free.

Union Junior and Senior High School concert bands will perform at 7 p.m. Wednesday at the high school. Admission is free.