““The dance took place on a viewpoint level of Tower Four. Each hour, the whole floor would make a single revolution, so couples at tables could see both the city and the ocean. This was by far its lowest-tech feature. The Synth-Bio Club had engineered all manner of plants and animals just for the occasion: grabby little tentacular vines that climbed up the walls, twirling maple keys that danced and spun in the air like pixies and spiralled up from whatever surface they touched, butterflies that dampened signal by flapping their Faraday wings. None of the students really noticed. They were too busy miming anal on the dance floor.””