HARPERS FERRY — The Cruisers rocked the stage at The Amp at Sam Michael’s Park, as part of the Jefferson County Parks and Recreation’s Summer Concert Series on July 25. The Hagerstown-based band played classic rock, southern rock, country music and fifties music for the crowd. JCPRC announced an addition to the summer concerts, during the event. The United States Navy Band Country Current, the Navy’s premier country-bluegrass ensemble, will play at The Amp on Aug. 11 at 6 p.m. There is no admission charge.