Queuebox utilizes the Spotify Developer API to allow users to listen to music together at social gatherings, through a single device. This way, friends can join a room and remote control what music is being played next, so the host of a party wont have to share his phone with anybody.
Its simple, you give away your 4-number room code, and people enter it to join and remote control.
Spotify Premium is required to play music, but only for the host. A free spotify account is required to be able to queue music.