The dance club culture on the Island of Ibiza was used as inspiration for a club-wide interactive system. The aggregate movement of the crowd is tracked with the help of glowing necklaces embedded with a location device. Based on the emergent behavior of the club-goers, music, lighting, and their respective intensity could be dynamically controlled. The form of the necklace modules was inspired by the island's historic Moorish architecture, a juxtaposition with its thriving modern nightlife.