Empire City
Land of Giants, City of Rooms, and Tower City are all common nicknames due to the unique nature of the city's architecture; huge open (or semi-open) air structures that connect the massive buildings to the outside world, a subway system that is supplemented with underground walkways and traffic tunnels, and a reputation for buildings with oversized rooms. This is a city that exists on at least 3 levels, and in some areas there's not just activity but habitation and commerce happening up to 5 levels down in ornate stations or cramped offices.
Among its competitive streak, focus on building, focus on commerce, and overengineered lifestyle the city also has a reputation for being clean. Not sterile, by any means, but tidy; waste is abhorred on an institutional level, with recycling of empty spaces or materials happening with a scavenger's intensity on every level of city operations. The City Health Department also retains a great deal of its authority from the late days of the 19th century.
The four main districts (as in, the ones I have set down) include: Gracewill - Now in the process of undergoing gentrification, home to a bunch of white collar businesses and a mix of upper middle or lower class income earners.
Keeling - The main business district of the city, its beating heart, home to high and steel-plated Art Deco skyscrapers or Post-Modern architecture on an enormous scale.
Highcourt - The home to many of the city's government buildings, as well as a great deal of its remaining historical buildings. It's mostly Neo-Victorian, Neo-Colonial, and similar in terms of architectural style though there are a number of sober Modern buildings. It's got a strong mix of income levels, sometimes varying greatly from block to block.
Bar Bay - The shipping and fishing part of the city. Mostly docks, warehouses, fish markets, and low-income housing.