Perspectives

Delhi:

Standing on the door of the metro, not moving aside to let people alight or board.
Do it in Mumbai, you will be cursed like hell.

Kolkata:

Most shops closed in the afternoon.
Do it in Mumbai, you will suffer losses in business

Mumbai:

Make that chippad kissing song to call out to people. It sickens me but it is so normal in Mumbai.
Do it in Delhi, I am sure you will get a shoe beating in public :P


Chennai:

Do that hand gesture which actually means what. But if your thumb isn't out, it is like the gesture for a hand job. I hate it.
Do it in Delhi, I am sure the girls will hate you :(