Various, T. Rex, Mungo Jerry, Stealers Wheel, Billy Preston, Peter Frampton, Quintopus, Elton John, The Hollies, Status Quo, John Kongos, Lee Michaels, Humble Pie

Detroit Proto-Punk

Pull this thread and you get Michigan guitar noise from 1969 ballrooms to 1999 basements, unbroken.

San Francisco Psychedelia

Ballroom bands who stretched blues and folk into twenty-minute jams, pressed before anyone edited them down.