If you’re curious about this topic, I highly recommend the Chinese Restaurants series of documentaries, which just came out on DVD. It is an excellent series of documentaries focusing on Chinese restaurants across the world.
I saw the “Song of the Exile” installment (about Chinese restaurants in Israel, South Africa, and Istanbul) and “Three Continents” (about Norway, Canada, and Madagascar). They are excellent. Each one focuses on a specific restaurant, but discusses how Chinese food, Chinese immigrants, and people of Chinese descent fit into the overall history and culture of each society. There’s the eloquent, poetic South African activist who’s actually a terrible cook, but inherited the restaurant when her husband died; the fast-paced, sharp, urban Hong Kong couple running a restaurant in the oppressive darkness of a small town in northern Norway; the born-again Christian in the Holy Land who makes his restaurant a center of the Chinese Christian community and sees it as a tool to convert immigrants to his faith; and many other amazing, moving stories. Not all the restaurants are even Chinese. The Canadian restaurant is actually an American-style diner that’s just run by a Chinese man.