 The "box" shown in several scenes in the film was inspired by a  large square booth that was built for The Monkees (qv) during the  filming of their TV show. Between takes, they grew bored and  wandered around the studio, often getting lost, so studio brass had  a large "room" built for them in one of the sound stages. According  to one of the Monkees, they would spend time there studying their  scripts, composing and playing music, and smoking (which they were  forbidden to do on the set). Colored lights were added to the room  to page whoever was needed on the set.