[shanwang]

As a foreigner I have lived in London for more than a decade and have friends and families living in SF. One interesting I found is although both London and SF have large number of foreigners/immigrants, in London not one group of immigrants have dominant majority and deep roots in the city. Immigrants usually live scattered around the boroughs, this I think makes London more diverse than many US cities. Because new comers will have to interact with people of other background and try to fit the culture of where they are living.