HDR, page-16

It WAS the Supremes - it was a song by those great Motown lyricists Holland & Dozier.

Here's an except from a bio on the VF:

"One night before a show, Tim Bogert and Mark Stein were hanging around outside the Cheetah Club on Broadway.

The Supremes' hit single, You Keep Me Hangin' On was playing on the car radio and the two of them began to wonder "what if" the song were slowed down and made "real soulful"?

That night, live on stage, the Pigeons worked out a new arrangement of You Keep Me Hangin' On that would play on car radios for the next thirty years."