After a Beer Festival in London, all the brewery managing directors decided to go out for a beer.
Corona's MD sits down and says "I would like the world's best beer, a Corona". The bartender takes a bottle from the shelf and gives it to him.
Then Budweiser's MD says "I'd like the best beer in the world, give me 'The King Of Beers', a Budweiser". The bartender gives him one.
Coors' MD says "I'd like the best beer in the world, the only one made with Rocky Mountain spring water, give me a Coors". He gets it.
The guy from Guinness sits down and says "Give me a Coke". The other brewery presidents look over at him and ask "Why aren't you drinking a Guinness?" and the Guinness MD replies "Well, if you guys aren't drinking beer, neither will I".