In my dim and distant, quickly fading memories, I seem to think that when I first went down to Cousins, the stage was facing you as you walked in the door, directly abutting the end of the bar counter.
Then it moved to be on the left as you walked in. Or am I mistaken?
I do remember that there was the lid of an old milk churn, the galvanised semi dome-topped type, which did duty (upside down) as an ash tray. I remember it because redd Sullivan threatened to crown a member of the audience, who talked all through his song, with said article.
I remember Jackson C Frank well, and still play and sing Blues Run the Game. I also remember him playing along with Bert, but I can't remember what they played.