A related one:
A town in Europe was holding a worldwide beer convention. Executives from every major brewery were attending. Some of them poked into a local bar to quench thier thirst.
An Irishman steps up to the bar first and says, "I'll have a Guinness. The best beer of the Emerald Isle!" The bartender draws him a pint.
Next a Dutchman steps up and says, "A Heineken for me- the greatest beer in all of Holland!" The bartender digs around in the cooler behind the bar and serves it to him.
Then, an American strides up to the bar and says, "I'll have an AMERICAN beer- Bud, the KING of beers!" The bartender sort of looks down at the floor for a moment, mutters "OK" and digs around in the back room. He finally comes out 5 minutes later with a bottle, dusts it off and serves it to the American.
As the American starts to step back from the bar the Irishman comes back for another round. He tells the bartender to just get him a glass of water.
The American is flabbergasted. "What? You're the head of the St. James Gate brewery and you're not drinking your own product?" "Well" replied the Irishman, "You're not drinking beer, so why should I?"