Mark, the bartender, points to a sign that says, "NO JOKES SERVED HERE" and asks them to leave.
They head out without a word.
The next day, Dabbles, a horse, walks in.
Same deal—bartender points to the sign, and with a long face, Dabbles leaves.
The following day, Joe the chicken walks in.
The bartender points to the sign again and says, "Sorry, no jokes served here."
Joe the chicken, annoyed, asks, "Fine, but where can I get a drink?"
Mark replies, "There's a bar across the road."