Movement on the dance floor at Club Watt generates electricity for the light show. The toilets are fed by rainwater.

By ELISABETH ROSENTHAL

ROTTERDAM, the Netherlands - If you felt that the atmosphere in the new hip Club Watt was somehow electric, you would be right: Watt has a new type of dance floor that harvests the energy generated by jumps and gyrations and transforms it into electricity. It is one of a handful of energy-generating floors in the world, most still experimental.
With its human engineering, Watt partly powers itself: The better the music, the more people dance, the more electricity comes out of the floor.
At Watt, which describes itself as the first sustainable dance club, that electricity is used to power the light show in and around the floor. “For this first club, we thought it was useful for people to see the results,” said Michel Smit, an adviser on the project. “But if the next owner wants to use the electricity to power his toaster, it can do that just as well.”
Watt is in large part the creation of the Sustainable Dance Club, a company formed last year by a group of Dutch ecological inventors, engineers and investors now headed by Mr. Smit. More than a year in the making, Watt is a huge performance space with not just the sustainable dance floor, but also rainwater-fed toilets and low-waste bars. (Everything is recycled.) Its heat is harvested from the bands’ amplifiers and other musical equipment.
“Our idea is that there’s enough energy in this world, you just have to use it the right way,” Mr. Smit said. “If you have a full dance club, there’s lots there, you just have to turn it into a usable product.”
Greener clubbing will obviously not solve the problem of rising greenhouse gas emissions, which scientists say are responsible for global warming. With their woofers and strobes, nightclubs are electricity guzzlers, unlikely ever to be carbon neutral even if scientists could harness the energy of a mosh pit.
Still, the energy produced by an average person dancing is about 20 watts’ worth, so two people could light a bulb, Club Watt’s scientific consultants have found. Aryan Tieleman, one of the club’s owners, hopes his sustainable dance floor will ultimately produce 10 percent of the club’s electricity. Green innovations at the venue will reduce energy use by 50 percent and water use by 30 percent, compared with the previous club in the building, he said.
“The concept is you party like you always do, but here it will be better for the earth,” Mr. Smit said.
Watt is the clubbing equivalent of driving a hybrid. Customers seem to like it. “Sure, I care about the environment, and I’m happy to do my bit in this way,” said Bas Muller, a student, emerging from bathrooms that feature waterless urinals and rainwater-fed toilets .
Club Watt, which holds about 1,400 people, is part consciousness-raising, part green-energy experiment - and in large part simple entertainment.
“The first thing is, I wanted to do my little something for the planet,” said Mr. Tieleman, who decided to build an entirely green club after seeing a presentation by Sustainable Dance Club on the dance floor, which functions through a technology called piezoelectricity.
But he added: “I’ll be very happy with whatever energy the floor produces for the club. And as a businessman, I know it attracts attention.”
Mr. Tieleman spent about $257,000 on the floor, an investment that will not be recouped from the energy it saves, he said, because as a first-generation model it is fairly inefficient.
The dance floor takes advantage of the piezoelectric effect: certain materials, when squeezed, develop a charge and produce electricity. When people are dancing, the sustainable dance floor yields by about 1 centimeter, compressing cells containing piezoelectric material underneath. In theory, piezoelectric floors can take the energy of any step or jump and convert it into electricity, although that process is now expensive and inefficient . But the technology is evolving .
Mr. Smit said that the company was working to develop cheaper, more effective materials. “You can use it anywhere there’s movement,” he said, “but the question now is when does it become costefficient?”