Lovingly referred to as the sixth stone, pianist Ian Stewart was actually a founding member of the original group, pre-dating both Charlie Watts and Bill Wyman as members. Stewart, or Stu as he was called, was one of a core group of rhythm and blues enthusiasts that frequented Alexis Korner's blues club. Among the others were Charlie Watts, Mick Jagger, Eric Clapton, Dick Taylor and Keith Richards, figures who would all go on to have a profound effect on rock n' roll music. Adept at boogie woogie style piano, Stewart began rehearsing with fellow enthusiasts Brian Jones, Mick Jagger and Keith Richards. When bassist Bill Wyman and drummer Charlie Watts joined, the group named themselves the Rolling Stones and began attracting a small but loyal following in London.