Why did the hotel say there was no room at midnight?

Judging from the estimated and free time, it is generally necessary to book a hotel half a day to one day in advance. Generally, you can go to always online in the afternoon, and count it as one day at twelve o'clock the next day! If you didn't book a room until the early hours of the morning, you left at the time stipulated by the hotel. It can be said that some guests will feel that they have not stayed all day, so they will have a quarrel with the front desk. In order to avoid such trouble, the front desk usually says that there is no room when receiving those guests who come in the early morning.