Can you find out if two people have a room?

Yes Two people will leave their hotel records in the hotel when they check in, which belongs to the category of personal privacy, but ordinary citizens themselves have no right to inquire about other people's records, and even public security personnel have no right to inquire casually without their consent. If the case is really necessary, such as a major criminal case, you can apply to the court to check other people's hotel accommodation records.