The final concert of the Blue Curtain series at Pettoranello Gardens Ampitheater features the Afro-Cuban music of OKAN and Latin-jazz legend Charlie Sepulveda and The Turnaround, shown here. Bring picnics and blankets to the free concert, which starts at 7 p.m. on July 27. The ampitheater is at Route 206 and Mountain Avenue. The bad weather location is the Princeton High School Performing Arts Center.