I just remember the piano (no stories) and the skits lasted a bit longer - into the late 60's.
I vividly remember a reversible coat demo so that "when the persecution came" the sister could reverse the coat to a different colour in the ministry.
A "householder" with a rolling pin in her hand told the sister she would be reported to the police for "banned religious activity".
A brother in a UK policeman's helmet (where he got that from I don't know!) pretended to question her asking if she had seen a woman in a blue coat (which she had reversed to a brown coat) - and she coyly pleaded innocence and said she had seen someone down the next street (which of course was her with the coat reversed the other way.) and off he goes down the aisle blowing a whistle calling out "come on chaps we'll find her and lock her up!"
All hammed up and very English. As a kid I loved it.
Demo in public talks.
This was late 70's and a visiting speaker turned up with a young couple in tow who did a demo about not having paid their electricity bill and that the red letter reminder had arrived and so they immediately paid it and resolved never to do that again because we should pay our debts promptly on time!
Oh the guilt! They hammed it up like they had defrauded an old aged pensioner!