I'm referring to All the Way from Memphis (1973) by Mott the Hoople. The lyrics are here. I think we can all feel a bit unhappy about the unfortunate use of the word "Spade" but I don't see any evidence it was meant with ill-feeling, or that it was a really pejorative word at the time.
Anyway, I have been intrigued why Ian (or "the protagonist" / "the auteur") says he felt "so ashamed".
It appears he left some "electric junk" in Oreole, then started out in the direction of Memphis, realised he had forgotten some stuff, headed back for his "junk", rang Information and eventually an African American, maybe in a Lost Property Office, then said "Rock and rollers - you're all the same. Man, that's your instrument".
Slightly embarrassed at one's forgetfulness, OK. But "so ashamed"?
PS: There's also a puzzle about "Oreole". There doesn't appear to be a town with this name in the USA. There are various Orioles, one not too far from Memphis (but it might have been far from Memphis: the journey back is said to have taken "a month", though this could be poetic licence).
Mott the Hoople's best-known tour of the US was in 1974, so this song's lyrics were too early for that. However, from Hunter's Wikip page, it appears that they did tour the US before that: "they could not sustain their commercial appeal, and their American tours were slow in building a following."