Many of the smarter social clubs in India have rules about how one should be attired when visiting them. The same is true for ‘elite’ clubs in London.
For example, at the Ootacamund (‘Ooty’) Club in southern India men cannot think oof having a drink at the bar if they are not wearing a formal suit and tie. And, at the Bangalore Club, men can where sandals in the Club House providing the sandals have a back strap. Even worse, at the same club the wearing of smart Indian national outfits is frowned upon if not forbidden. This is surely a hangover from the days when the club only admitted ‘white’ Europeans and a few high-ranking Indian military personel.
Once, I was staying at the Kodaikanal Club in Tamil Nadu state. Dress rules were extremely casual there. Many guests wore shorts and sandals even in the bar and dining room. One day, I entered the club’s small library, and the librarian promptly asked me to leave. I was wearing sandals (with backstraps). Apparently, in the library gentlemen are required to wear formal lace-up shoes. I cannot say why this was required unless the Kodaikanal holds literature in high esteem, and wants it to be respected by library users who have taken the trouble not to be dressed casually.