Gorenza
What size of city do you want the story to take place in?
As the title (Dead
world) implies, roleplayers are not limited to any one specific setting (any one city, state, or country). New roleplayers aren't obligated to start off in the same setting as the rest of the roleplayers. However, this roleplay is set in a realistic world, so it will take a while for one character to navigate a setting, or to move from one setting to another (and that's not even accounting for the interference of zombies). In other words, the world is your oyster, but don't expect moving around in it to be easy.
That being said, I fully expect the "story" to move from one setting to another, as one place cannot sustain the survivors forever, let alone for very long.
No place is safe, only safer.