Vinny Guadagnino was a continent away from 'Jersey Shore,' when he guest-starred as a representative of all the sin that Sin City has to offer on '90210' (Tue., 8PM ET on The CW). While he manages to lure Liam into a very intense game of poker. In fact, Liam quickly loses nearly all of his money.
But then he takes a big gamble by going all in on one hand. Vinny backs down and we never even get to see if Liam was bluffing or not, but the bottom line was that he won back the money he'd lost and was smart enough to walk away before he was down again.