I think uniformity of density allows for uniformity of traffic, however that does not require uniformity of "culture and ambiance" for lack of a better term. If there are 10 million people in the city you can have vastly different ambiance in different parts of the city, yet with roughly equal number of people trying to get to any such spot at any point in time.

Does it make sense? I am trying to avoid a situation where some parts of the city are much more popular that others for people at large, and I think that does not contradict that some part of the city would be more attractive to a subset of people.