Yes, Groucho performed in Gilbert and Sullivan

This also happened according to Wiki:

During a tour of Germany in 1958, accompanied by then-wife Eden, daughter Melinda, Robert Dwan and Dwan's daughter Judith, (Groucho Marx) climbed a pile of rubble that marked the site of Adolf Hitler's bunker, the site of Hitler's death, and performed a two-minute Charleston

That pretty much sums up human civilization.

In case you wondered what the Charleston looks like.