So I've been watching the new David Simon fiction series "The Deuce" set in 70's New York and centering on sex work, and fair number of characters in the series are pimps of some variety.
What interests me is that the show sort of tacitly depicts two different sorts of pimps; white massage parlor guys with "connections" and the classic stereotype of outlandishly dressed African American man, complete with fancy hat, patterned suit and a studded cane.
Characters in the show are depicted decrying the death of the pimp lifestyle as pornography producers begin to poach "talent" and obviate the pimp. So I've inferred that by the 70's, this stereotype was already well entrenched.
A couple things, then:
Not to discourage further discussion, but this has actually come up before with an excellent answer from u/yodatsracist.