As long as you have adequate food and water, and there's no nukes floating around, staying in the city is a viable option. You'll have greater access to technological resources when things calm down and the surviving rural populace comes to town to trade <img src="/images/graemlins/smile.gif" alt="" />

Suburbia would be better, but hey, surviving is about making it with what you have!
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Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, a critter that can be killed but can't be tamed. --Robert A. Heinlein