Old expression: "Those who can, do. Those who can’t teach." Don’t blame me, I didn’t coin it ;-) .
Cold Blood were.....hot. All the Bay Area musicians loved ’em. For a male-fronted band with horns, it was The Sons Of Champlin and Sly & The Family Stone. Chicago were (are) squares, like the guys in your high school marching band. Tower Of Power were/are too "busy" for me.