Michael plays a Detective in the early scenes where Pryor starts to work in a mafia owned comedy club. He saves him when Richard tries to force the owners to pay his salary with a starter gun. He is actually a lover of Satin Doll, a stripper at the place who helps him get work there.

Sorry, ancient thread. But, the belated answer is that they are both basically cameos. But they're great characters, though.
Ironside is a tough detective that bails Pryor out of a jam just in time. Hauser is a sleazy Beverly Hills rich party guy that bangs Pryor's wife at a party (and Pryor kicks his ass).

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