Will there be a fine for three people in a big bed room?

No. Three people sleeping in a big bed room will not be fined. The number of people living in standard rooms exceeds the specified number, which is generally not acceptable. If there are too many people living in standard rooms, there will be security risks. A standard room in a hotel is usually a double room (standard double room). The main reason for placing two beds is that if even-numbered guests stay in the hotel, couples actually account for only a small proportion, and more are colleagues, friends, members of non-husband and wife tour groups and non-husband and wife relatives, such as father and son.