That dancing can take a lot of energy at times is news to no one. But that it can be tapped as a ecologically friendly source of electricity, well, that may come as a surprise to many. Believe it or not, according to the group PERC, a new dance floor has been constructed in Europe that makes its own electricity. As dancers move about, the floor bounces on ceramic blocks and produces a current that is fed into a bank of batteries. The more dancers that take to the floor, the more electricity is generated to power lights and air conditioning. Since many of these same clubs are also giving discounts to folks who ride in on bikes, it seems like these dance clubs take generating electricity on the dance floor quite literally indeed!