According to David Cross in his memoir, a blackjack dealer asked him if he could get Jim Belushi's autograph for her sick 8-year-old son. Cross agreed to do it. But when he asked, Belushi vehemently refused to give an autograph.
The name of the talent agent played by Allen Garfield is Vinnie Vidivici. This is a wink to the Latin of Caesar's famed message to the Roman Senate after his defeat of Pharnaces, "Veni Vidi Vici", which translates as "I came, I saw, I conquered."