Conservative India hosts allow married couples only

Many Airbnb listings in India use a version of this caveat: married couples only.
In essence, the Airbnb hosts do not accommodate couples of the opposite sex unless they are married or are siblings or close relatives (often requiring documentary evidence). The refusal is usually based on cultural sensitivities or stems from the fear of harassment by the cops or the moral police, a peculiar south Asian vigilantism against anything deemed immoral.
For instance, businessman S Nisar, who rents out a property in Chennai, fears getting unwittingly involved in illicit activities. “Actually, if we allow unmarried couples, there is a risk that we, at our place, are allowing prostitution,”

Airbnb has a non-discrimination policy which states hosts can’t refuse guests based on their race, religion, national origin, sexual orientation, or other reasons. However, these guidelines are strictly followed only in the US and the European Union, Airbnb notes. The San Francisco-based room-booking portal recognises that “some countries or communities may allow or even require people to make accommodation distinctions based on, for example, marital status, national origin, gender or sexual orientation.”