Only a very small subset of people living in the city will use nightclubs. It is reasonable that they are not given priority over things essential to living (housing, accomodations, transport, public services, etc..).
People move to the city because of things to do which includes nightclubs, restaurants, museums, theater, sports venues, cultural events, etc.
If all you want is a bunch of houses and roads connecting them and basic public services, you can get that for a fraction of the price in the suburbs.
> People move to the city because of things to do which includes nightclubs, restaurants, museums, theater, sports venues, cultural events, etc.
Now remove nightclubs from this list, and you still get a list of attractive reasons to settle in a city.
You don't have to infringe on the night of others to still have an enjoyable city. To repeat myself: you could close all the nightclubs in a city and you would still have plenty to live for there.
Edit: Also worth noting is the daylife, shall we say. That is, cafes and the like are a lot more popular than they used to be.