A friend of ours was going through her dad’s hilarity and knick-knack box, and found this old practical joke.
(Everybody’s dad has a drawer of stuff. My dad’s mainly had coins and tokens, one from a place called “The Stork Club” which sounds expensive.)
Anyhoo… The idea here was that you talked into the little microphone/speaker, then you were supposed to “press button firmly” – but the “button” concealed an inverted thumbtack that would impale your finger, much to the delight of the other drunken fools in the room. Probably there would usually be someone so drunk, they would say “Oh! Let me try!”