Expatriates, or the so called white-collar workers with a job in a country other than their home country usually adapt very slowly to the local culture and they are looking for places that are common even in their home countries.
I am still in China on a business trip, and after two weeks I somehow get into a McDonald's fast food restaurant. Impressively, I have not seen such a high rate of non-Chinese people in one place at the same time in China so far! Of course, I know it is not only expatriates, but many businessmen as well! I would exclude the tourists, this is not exactly the quarter for the tourists.