A theater (54) can be divided into a plurality of booths (64) by booth partition walls (68). As the booth partition walls (68) move, the booths (64) are united to form a united theater (66). While the theater (54) is being separated into the booths (64), each booth (64) provides a booth image, in which the image of a guest accommodated in the corresponding booth (64) is incorporated as a cast. The united theater (66) provides a united theater image by using a screen (70) of all booths (64). Each booth (64) provides a default image when a trouble occurs in the booth image creating function.