If a man and woman are not married to each other, it is a criminal offense in India, to be behind closed doors, even with their clothes on. It is the law of the land. You can be raided by police. Many hotels have employees (boys) who tip off the police for the share of the bribe amount they get paid. Be careful. Even young couples take along some photos from their wedding album when they go on their honeymoon or go on a tour or pilgrimage, to be able to convince some decent, honest policemen, even though most would let them go if they are suitably bribed.