On the 7th of May 2009, Intercontinental Hotels Group PLC, the world's largest hotel operator by rooms, invited about 20,000 people in the cities of London, Shanghai, Paris and New York for a collective jump on four enormous beds.On the 7th of May 2009, Intercontinental Hotels Group PLC, the world's largest hotel operator by rooms, invited about 20,000 people in the cities of London, Shanghai, Paris and New York for a collective jump on four enormous beds.