After the Great Britian Beer Festival, in London, all the brewery presidents decided to go out for a beer.

The guy from Corona sits down and says "Hey Senor, I would like the world's best beer, a Corona."
The bartender dusts off a bottle from the shelf and gives it to him.

The guy from Budweiser says "I'd like the best beer in the world, give me 'The King Of Beers', a Budweiser."
The bartender gives him one.

The guy from Coors says "I'd like the only beer made with Rocky Mountain spring water, give me a Coors."
He gets it.

The guy from Guiness sits down and says "Give me a Coke."
The bartender is a little taken aback, but gives him what he ordered.
The other brewery presidents look over at him and ask "Why aren't you drinking a Guiness?" and the Guiness president replies
"Well, if you guys aren't drinking beer, neither will I"