This is one of three old signs I picked up a few years ago at this bizarre place close to my house: orchestra center, orchestra right, and orchestra left. Each are mounted on tall metal stands. All have been used to the extreme - banged around a lot. The paint is chipped and the metal is beautifully corroded. I think they signify the seating.
Orchestra Center now keeps its constant vigil over our kitchen... the central gathering place of our home. How comforting!