A tired traveler pulled into a three-star hotel around midnight and asked reception for a single room. As the clerk filled out the paperwork the traveler looked around and saw a gorgeous blonde sitting in the lobby. Asking the clerk to wait, he went over and talked to her. A few minutes later he came back with the girl on his arm and said, 'Fancy meeting my wife here! Guess I'll need a double room.'

Next morning, he came to settle his bill. Handing over his Amex card, he was appalled to be confronted with an account for $3000. 'What's the meaning of this?' he yelled at the clerk, 'I've only been here one night.'

'Yes,' said the clerk. 'but your wife has been here for three weeks.'