So I was out on the Vegas strip, just exploring, pointing and laughing at drunks while watching random gamblers dance with random hokers (Laughing all the while)... Lo and behold, what do I see? A Gambler NPC that looks a lot like John Lennon. Hair, glasses, face, sideburns and all. I don't know if that NPC was a reference to him, but if it was, then kudos!
He's wearing a light brownish Fancy Gambler Suit and a pair of Tinted Reading Glasses. Cool stuff.
(Yes, yes, I know... The Beatles weren't around until the 60's.)