The Starting Gate! Thanks John, I have been trying to remember the name of that place for years. I remember seeing The Levee Breakers there. Lineup may have been, Beverly [later Mrs Martyn] on vocals, Mac McGann on the first double necked guitar I ever saw, Henry the Eighth on jug, among others I have forgotten.
BTW, the club in the crypt of that church in Bayswater, was The Holy Ground, Mike Absolom was there a lot.