A Harmony Room
Participants work in groups of two. The first person walks into the room where their position determines a musical pitch. As they move about, they change the pitch of the audible signal. They are free to choose a place to stand as they're comfortable. Once set, the second person enters the room and seeks to find a harmonious frequency with their partner. Depending on the musical ability and difficulty settings of the program, the participants might hear a ding or get a haptic signal once they are in the proper place. They can then begin to stack more harmonies or choose to begin a tempo and time themselves. Could also be modified to teach students musical intervals, projecting them onto the screen as they move about.