At a world brewing convention, the CEOs of various brewing organizations retired to the bar at the end of the day's conference.
The CEO of Fosters shouts to the barman, "Pour me a Fosters, mate!" The CEO of Budweiser is next, "Gimme a Bud, sir!" Then the CEO of Beck's, "Ein Becks, danke." Then they all turn to the CEO of Guinness who says, "Barman, would ya give me a diet Coke with ice and lemon, thanks."
The others stare at him in stunned silence, amazement written all over their faces. Eventually one asks, "Are you not going to have a Guinness, Pat?"
Paddy replies, "Well, if you chaps aren't drinking, then neither am I."