If you live in any big city in any country in the world, you are much more likely to have people of your same class as friends and acquaintances than people just from your country or race. People's nationality does not matter at all, but rather whether they are in the same social circles, similar education, similar jobs etc.

Absolutely, people within the same economic or professional circles but living in different countries have more to talk than people from the city or a rural place in the same country