After the Great Britain Beer Festival, in London, all the Presidents of the brewreys decide to go to the pub for a drink. The coors President said "Can I have the only beer made with Rocky Mountain Spring Water: a Coors, please."
The bartender gave him the drink.
Then the Budweiser President orders, "The King Of Beers -- Budweiser."
The bartender proceeds with the order.

The Amstel President walks in and orders "The Finest Beer ever."
The bartender gives him an Amstel.

Then the Guinness President says, "I'll have a coke please."
The bartender is taken aback by this but gives the coke to him anyway.

All the Presidents looked over at him and said, "Why have you ordered a coke?"
He replied, "Well if you all aren't drinking beer, then neither shall I."