What started out as a joke in an Amsterdam art gallery in 2003 has since flourished into a fully fledged sporting event. A simple concept really: play four minutes of chess followed by two minutes of boxing. The one who reigns victorious does so either by knockout or checkmate. These top tickets include exclusive access to the VIP bar, serving a generous supply of "performance enhancing" cocktails and treats. And don't forget about the interval cabaret and legendary afterparty DJs. It's a night jam-packed with a punch. VIP admission. Over 18s only. Afterparty in the bar till 3am.