Just looking at the map, the ten mile radius around where I work seems like it's got several sharply segregated areas full of Asian people. From the ground, I know those areas are just apartment complexes where (highly skilled and not at all impoverished) Indian people on temporary work visas tend to stay, and most of them would probably be able to buy a house on my block if they intended to be here permanently. The west side of the city has some old-fashioned segregation, though.