An Irishman is sitting at the end of a bar. He sees a lamp at the end of the table. He walks down to it and rubs it. Out pops a genie. It says: "I will give you three wishes."
The man thinks awhile. Finally he says: "I want a beer that never is empty."
With that, the genie makes a poof sound and on the bar is a bottle of beer. The Irishman starts drinking it and right before it is gone, it starts to refill. The genie asks about his next two wishes.
