Various, Chickenfoot, Foreigner, Steppenwolf, Ian Gillan, Chris Rea, Deep Purple, Marillion

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.