We recently started taking a Chinese friend to our local Chinese takeaway and the difference has been remarkable.
They have always been a great family and always really friendly but once you get used to standing there having no clue what they are on about while the food cooks the service has been great. Free food, free fortune cookies, the other night we were running late due to a problem and having to go to hospital so they re-opened the shop at 23:30 just to cook whatever we wanted.
I think it is about respect and common ground more than anything and to stay semi on topic, yes they do provide food that isn't on the menu. Invariably it comes from their own private supply and consists of strange soups (rabbit based) and other odd sauces and stuff. I've tried some of it but mainly my Chinese friend tucks in quite happily!
Food has always been 'westernized' for lack of a better term, there are things we simply wouldn't eat that other cultures would.