Privilege Ibiza, originally known as Ku Club (1979–95), is the "world's largest nightclub" according to the Guinness Book of Records, also defined as a superclub with a capacity of 10,000 people and encompassing 6,500 m² (69,940 ft²). It is located close to the village of Sant Rafael de Sa Creu on the Spanish island of Ibiza, less than one kilometre from the nightclub Amnesia.

A superclub is a very large or superior nightclub, often with several rooms with different themes. The term was first coined in Mixmag, the British electronic dance and clubbing magazine, in 1995, referring to the new wave of clubs such as Ministry of Sound and Cream, which were dominating the English club scene.