Rent an expensive Hotel Room

A customer stop by an hotel in the middle of the night . He ask the waiter to gave him a single bed room for 1 day .

Suddenly, the customer saw his wife who he had been missing this few days . He went to his wife and bring her to the counter and said to the waiter that now he wants a queen size bed room . 

The next day, when he was about to pay for the rent, the waiter said that the cost is $3000 . He was shocked and shout at the waiter and asked why ? The waiter said that his wife had stayed in the hotel for 7 days .