Matter was a London music venue and nightclub that opened in September 2008. A 2,600 capacity live music venue and nightclub, it was the second project for owners Cameron Leslie and Keith Reilly, founders of the London club Fabric. Matter was the third venue to open at The O2 in south-east London.Opened after three years of planning, Matter housed several visual installations, a sound system of some 200 speakers and a version of Fabric's 'BodySonic' dance floor, the 'BodyKinetic' floor.