After the Great Britain Beer Festival, in London, all the brewery
 presidents decided to go out for a beer.  
 
 The guy from Corona sits down and says "Hey Senior, 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."