The Maretime Bay cinema (unofficial name, as no name has been given to it in canon), is the movie cinema of Maretime Bay. Not much is known about it, although both its exterior and interior has been shown on various occasions.
Interior[]
In It's T.U.E.S. Day, the cinema is shown as a single 30-seat conventional cinema auditorium, screening Trotsformers. Only 3 ponies (One of whom was Señor Butterscotch) attended that particular screening.
In My Little Pony: Virtual Magic, the player sits next to Sunny Starscout in one scene, and the auditorium has gained considerably more seats.