There are some people that rarely leave Manhattan except to go to the airport, it is as if its island status makes its inhabitants behave like they live in a medieval walled city.
A new breed of Manhattanites are even more particular, they rarely leave the districts that comprise the lower rise neighborhoods that are hemmed in between Midtown and Wall St., Greenwich Village, the East Village, Lower East Side, Tribeca, etc. Clearly it needs an all encompassing name, what about the Schmillage, suitably nonchalant?