Right after their first Marquee gig in July 1962, the Rolling Stones quickly built up a reputation as an exiting live band. But before we move on further on that road, here's a little fact sheet on what happened in the months before.
April-June, 1962: The embryonic Rolling Stones rehearse in different line-ups in clubs and pubs around London. The musicians involved included: Mick Jagger (voc)/Andy Wren (voc)/Brian Knight (voc, harm)/Brian Jones (gtr)/Keith Richards (gtr)/Geoff Bradford (gtr)/Ian Stewart (p)/Cyril Davies (harm)/Dick Taylor (bass)/Dick Hatrell (bass)/Charlie Watts (dr)/Tony Chapman (dr)/Mick Avory (dr).
July-October, 1962: The Rolling Stones (at that time also called the Rollin' Stones or even Mick Jagger and the Rollin' Stones) perform at the Marquee International Jazz Club, the Ealing Jazz Club, and other venues in and around London. Line-up: Mick Jagger (voc)/Brian Jones (gtr)/Keith Richards (gtr)/Ian Stewart (p).
Bill Wyman and Charlie Watts did not become regular members of the band until early February 1963. The following musicians filled the spots: Dick Taylor (bass)/Ricky Brown (bass)/Colin Golding (bass)/Tony Chapman (dr)/Carlo Little (dr)/Steve Harris (dr)/Colin Folwell (dr).
For those of you who would like to dig deeper into the development of a whole new musical scene in and around London in the early sixties, here's an article on British rhythm & blues.