Explain the events below using supply and demand.
At a restaurant that does not take reservations, people arriving at 7:30 normally have to wait for an hour, but some people arriving at that time give money to the hostess and are promptly seated. At another restaurant that takes reservations, there is a month wait for a Saturday night reservation, three weeks wait for a Friday night reservation, two weeks wait for a reservation Tuesday-Thursday nights, and virtually no wait for a Sunday or Monday night reservation.