A young man walks into a near-empty bar (pub) carrying an oversized suitcase, which he puts on the floor and opens up--it folds out into a miniature grand piano, with a little one-foot-high man in a tuxedo next to it. At the young guy's motion, the little person sits down on the piano bench and begins playing beautifully.
"Amazing," says the astonished bartender. "What can he play?"
"Anything you want," his customer replies, "Classical, jazz, show tunes, folk music, popular stuff--you name it."
The bartender asks, "Wherever did you find him?"
The young man explains: "I was on vacation in Ireland last month, walking in the woods and being a bit distracted about a serious personal problem, keeping my girlfriend satisfied in the sack, when I stumbled across a very old leprechaun--I caught him only because he was quite hard of hearing and didn't hear me approaching behind him. He was supposed to grant me three wishes, but he said his magic was as old and weak as his hearing, so he could only give me one wish."
The bartender looks dubious. "So this pint-sized piano player, that's what you wished for?"
The customer shrugs. "No, not exactly--but as I told you, the old leprechaun didn't hear very well, so I ended up with a twelve-inch pianist..."

--C.K.