I had a guy come up to me while playing a blackjack slot machine in planet hollywood a couple of years ago claiming to have knowledge of how to beat the machine. He was a personable Asian fellow and I let him, first, instruct me what to do, then later actually let him play the game directly. He lost my money, lol, a few dollars. I can only imagine that he may have figured if he won I would give him part of those winnings, although he did not seem the least bit needy.