Congratulations on moving to the big city.
Now, get familiar with big-city electrical. You'll see a lot of the metal conduit wiring method. This is an industrial-grade wiring system that is required where safety matters more, because more lives or property are at stake. They typically require it in multiple occupancy buildings, to reduce electrical fires.
In this type of installation, the metal conduit shell is often the ground. This is better than ground wires most of the time. Flexible conduit or metal-clad cable can be "hit or miss" as to whether it is a valid grounding path, however.
Another thing about that is that DIY electrical is not necessarily on the menu.
- Certain large cities prohibit DIY electrical.
- You're one unit in a larger building, and you don't own the land, the roof, or the building. That means there is an owner or HOA, and you must follow their rules.
- Because you are in a multiple occupancy, all work must be done by a licensed electrician because of the potential danger to other occupancies if the work is botched.
- If you are renting, the work must be done by a licensed electrician, for above reasons and also to prevent landlords from doing shoddy DIY work that endangers the tenant (so this would be true even in a standalone single family home).
Skipping out on the permit process isn't on the menu either. Again, you must go through both the city and the owner/HOA and/or landlord.