Hard Rock International, as a part of a commitment towards a cleaner, eco-friendly world, is once again reflecting on its partnership with global leader in environmental conservation World Wildlife Fund (WWF), and participation in the annual Earth Hour movement. On Saturday, March 25, more than 135 Hard Rock Hotels, Cafes and Casinos around the globe participated by "going dark" for one hour starting at 8:30 pm local property time. This year has proven to be Hard Rock s most successful Earth Hour activation to-date, with more participating Hotels, Cafes and Casinos, and kilowatts conserved than ever before in the history of the partnership with World Wildlife Fund.