Had they ever played poker?
I like this film but there's no evidence of a poker player in the mix. Its another one of these, "the best player always holds the strongest hand" films and twice the players mention tipping the dealer with there chips. (the players and chips are satelited to the final table and its winner take all. The chips dont actually represent money).
I dont like to nit-pick but this sort of thing does impact on the story and reduce my enjoyment of it.