Down the rabbit hole I went.

https://youtu.be/aDATXtewPrg

Koko the Clown is singing Cab Calloway's "St. James Infirmary Blues"

https://songmeanings.com/songs/view/3530822107859233639/

The lyrics tell the story of Joe, who had recently seen his partner dead in the hospital from an illness. He goes to the bar to drink his sorrows away, realizing that he may be die from the same illness soon. Joe begins making funeral arrangements with his lowlife buddies, asking to be dressed in his nicest clothes and for his closest friends to cause a big ruckus in his procession.