"How to sing the blues" has been posted before and in general it's true and very funny. However, I have to take exception with the "affliction/fruit/president" algorithm for naming blues singers. It's obviously a reference to Blind Lemmon Jefferson but doesn't even come close to applying to anyone else. There were quite a few bluesmen with "Blind" in their names but I can't think of any other "afflction" in a blues name. The only other fruit name connected with the blues is Cheech and Chong's fictional "Blind Melon Chittlens." As far as presidents go there are plenty of Johnsons and Jacksons but thoses are pretty generic names. Maybe you could include Roosevelt Sykes but that was a first name.

More often, blues singers were named after places: Tampa Red, Memphis Minnie, Kansas City Joe, Mississippi John Hurt; or size: Little Milton, Little Walter, Big Walter, Big Mama Thornton, Guitar Slim; or both: Memphis Slim.