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ROTTERDAM:ON A SATURDAY night, I'm more likely to be reading children's bedtime stories than throwing shapes on the dance floor.

However, when I heard about the opening-night party at Rotterdam's Watt, the world's first venue to use the patented "Sustainable Dance Club" (SDC) concept, I was tempted to get back into the groove. SDC is a collaboration between the green-entrepreneur consultancy Enviu, architect Doll-Atelier voor Bouwkunst and Prof Han Brezet of the Delft University of Technology. Watt's star attraction, the 60sq m "energy-generating" dance floor, is based on an electro-magnetic generator and cost €200,000 to develop. In simple terms, the more people dance, the more power is generated, illuminating light-emitting diodes in the floor tiles.