Three men walk into a bar. One works for Budweiser, one works for Corona, and one works for Guinness.

"What would you like?" the bartender asks the Budweiser worker.

"I'll have a Budweiser," says the Budweiser worker.

"And you?" the bartender asks the Corona worker.

"I'll have a Corona," responds the Corona worker.

"Let me guess," the bartender says to the Guinness worker, "you'd like a Guinness?"

"No thank you," comes the reply. "I'll just have some water."

"Water?" The bartender is taken aback. "Why not Guinness?"

"Because," says the Guinness worker, "if the other two aren't gonna have beer, I'm not gonna have it either."