This is the 37th dance competition organised since the death of "Rock Around the Clock" creator Bill Haley, and the premise is quite simple: fifty couples will spend a full hour dancing in rock'n'roll/rockabilly style for the chance to win the Bill Haley Trophy. For those who don't manage to apply in time, no worries - an afterparty will follow at 20:15, where everyone will get the chance to dance their heart out.