Can men and women wash single rooms without a marriage certificate?

Men and women can't wash a single room without a marriage certificate.

A man and a woman are not allowed to take a bath in a single room. According to the relevant hotel management regulations, a man and a woman need to show a marriage certificate when registering a hotel room. If they are not husband and wife, the hotel will not let them stay without a marriage certificate. If they say they just take a shower and don't get together, they won't go through the formalities, because couples can't get a room without taking a shower in the same room.