Might be good if some of us decided to be already together. That way we don't get eight different stories going on at once.

As for a starting point, I'd say any unnamed city ruins would be fine, just describe what's around it. Major real life cities would be all but unrecognizable anyway if a nuclear war happened. NYC would be a prime target, it being an economic hub for the US, so it would probably be pretty bombed out, if not just a big crater.