I enjoy Barbershop Quartets in moderation.

This discussion brought to mind the 60s sitcom "Car 54, Where are You?" In one episode, Jan Murray (a US comedian)judges a Barbershop Quartet contest for the NYC Police Department. The catch? Every group, and there appeared to be hundreds, sang "By The Light Of The Silvery Moon". And every group started with "Boom Boom Boom Boom...By the light..." In the end he is carried away screaming in agony.

That seems to be the effect too much Barbershop has on most people. But the same is true of Sea Shanties and Parodies.