A nine-member ensemble of the United States Navy Band will perform two free concerts on the Marblehead Peninsula on Sunday, Sept. 1. The band will play at 2 p.m. at Hoover Auditorium in Lakeside. Then at 7 p.m. they will perform at the MarbleheadLighthouseState Park. Both concerts are free and open to the public. Guests attending the evening concert are encouraged to bring lawn chairs or blankets as no formal seating will be provided.