One day the head of Anheuser Busch, the head of Coors, and the head of Guiness walk into a bar and go to the counter. There the bartender asks them what they'll have.
The head of Anheuser Busch says, "I'll have a Budweiser."
The head of Coors says, "I'll have a Coors."
The head of Guiness says, "I'll have a soda."
A bit surprised the bartender asks him, "Why are you having a soda?"
The CEO of Guiness replies, "Well, since neither of my friends are having a beer, It didn't seem right to have one myself."