COUNTY

The Bach Society will present the choral performance “Sing As One” on Friday at Center Presbyterian Church in Slippery Rock and on Saturday at Tower Presbyterian Church in Grove City. Both concerts begin at 7:30 p.m., and admission is free.

Masterworks Concert Chorale, a chorus of singers in the Greater Pittsburgh area, will perform at 2 p.m. May 19 at Concordia Haven Apartments’ Haven I Dining Room, 112 Marwood Road, Jefferson Township. Admission is free. The chorale is dedicated to performing a classical and contemporary repertoire. Reservations are preferred, but not required. Call 724-352-1571, Ext. 8518.