I heard “I’m A Man” by the Spencer Davis Group, but the Chicago cover (when the band’s name was still Chicago Transit Authority) is my preferred version. I have a fond memory of being sixteen. I was at a friend’s place with several others. We had the lights low, and were smoking some grass, drinking beer, and listening to “I’m A Man” cranked up. That opening bass begins, and then drums rise and other instruments join and build tension.
Ah, fond memory.