The founders of all the beer companies meet up for a night out at the bar.
When the bartender starts taking their orders, Adolph Coors orders a Coors, Frederick Miller orders a Miller, John Kinder Labatt orders a Labatt's and Arthur Guinness order a club soda.
All the other beer guys stare at Guinness and ask him, "Why didn't you order a Guinness?"
Arthur Guinness says, "If you guys aren't going to have a beer, then neither am I."