A man phones a mental hospital and asks the receptionist...
A man phones a mental hospital and asks the receptionist if there is anybody in room 27. She goes and checks, and comesback to the phone, telling him No, the room is empty. "Good," says the man. "That means I must have really escaped."

A group of chess enthusiasts had checked into a hotel...
A group of chess enthusiasts had checked into a hotel,and were standing in the lobby discussing their recent tournament victories. After about an hour,the manager came out of the office and asked them to disperse."But why?", they asked, as they moved off."Because," he said, "I can't stand chess nuts boasting in an open foyer."