Kuala Lumpur, Malaysia isn't only over-populated by Muslim Malays ya know. We have lots of non-Muslim Malaysians of other races, and expats here that go for this kind of stuff. It's suppose to be illegal by the Islamic law but ya know what? Secular laws reign supremo here. This is what happens when some Muslims realise that praying five times a day is kinda pointless, when time is better spent hosting such an event cuz it makes way more money and prestige for the country.