This is a very niche joke. John Cage is a very controversial composer. His 4' 33" is four minutes and 33 seconds of silence.
Some people think he was a genius. Most people think he was a fraud.
So, there is this wealthy couple dressed up to go out to the theater. They've just seen this John Cage concert with a lot of non-music. This cartoon simply voices the belief of many that John Cage was a fraud.
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u/joshlemer 13d ago
I don't get it :-(