Doors open 6:30 p.m. for musicians, poets and other performers to sign up for 6:45 to 8:15 p.m. open mic; featured performers play 8:30 to 9:30 p.m. at Damariscotta River Association’s Round Top Farm, Business Route 1, Damariscotta. Cost: $6; $3 senior citizens; free for children. FMI: 563-1393. Second Friday of each month.