It's okay to ask casually, but if you go to the real estate company or without permission, and then you check whether others have a room, it's an invasion of privacy.
Violations of privacy include:
1. Make public the name, portrait, address and telephone number of citizens without their consent.
2, illegal intrusion, search other people's homes, or otherwise disrupt the peace of others.
3. Illegally stalking others, monitoring others' residences, installing eavesdropping equipment, secretly photographing others' private lives, and spying on others' indoor conditions.
4. Illegally spying on others' property status or publishing their property status without others' permission.
5. Privately open other people's letters, peek at other people's diaries, spy on other people's private documents and make them public.
6. Investigate and spy on other people's social relations to make them illegal.
7, interfere with other couples' sexual life or investigation.
8. Publicize other people's extramarital sex life to the public.
9, the disclosure of personal materials of citizens or open or expand the scope of disclosure.
10, collecting pure personal information that citizens are unwilling to disclose to the society.