Watched this last night off one of the 'ABC Nights In' DVDs from 1968, and surprised how lack lustre it was. I really struggled to get a laugh out of this, which was more surprising as it was written by Eric Sykes.
So, we had Frankie, sitting in a theatre dressing room thinking back to what it must have been like in one of those honky tonk saloon bars during the Klondike gold rush where they had a stage for the turns, "starring" Hattie Jacques as mein host, and Sandie Shaw (who sang live) and Scott Walker (who mimed) and Patrick Wymark as a drunken cowboy, with Frankie as some sort of chancer.
I have to say, it was poor - born out by the fact, maybe, that Frankie kept repeating a "joke" if it didn't get a laugh the first time - they didn't laugh Frankie 'cos it wasn't funny.