A Priest, a Rabbi, and a Minister walk into a bar. The Priest says "I bet i can go up to the bartender, have a few beers, and get out without paying." The Rabbi and Minister do not think this is possible, so without further wait the Priest goes up to the bartender, has a few drinks and begins to exit the bar, but the bartender calls out "Sir you forgot to pay for your drinks" The Priest replies, "No your mistaken, i already payed, good night" and walks out.
Then the Minister in disbelief says he'll give it a go as well. So he does the same, goes up, has a few drinks, and begins to walk out when again the bartender says "Sir you forgot to pay for your drinks". The Minister then replies, "No your mistaken, i already payed, good night" and walks out.
The Rabbi is astounded, but walks outside to see his buddies, he says those were good, but I've got one better. He walks up to the bartender, has a few drinks when he begins to walk out the bartender calls to the Rabbi and says "Sir, you forgot to pay for your drinks" the Rabbi replies, "No sir your mistaken, i already paid you, now i need the change back for my hundred."