有成功先例并且唯一可行的备选方案可能就要数伦敦和纽约了，其主要特点是所有人拥有共同的公共领域，而在"私人"领域，特别是居民区中则有很多文化差别。
The only viable alternative for which there are examples is probably that of London or New York. The main characteristic of this alternative is the coexistence of a common public sphere shared by all and a considerable degree of cultural separation in the "private" sphere, notably in residential areas.