For ppl who still have no power, most of the chain eateries have generators and are open. Problem is, if you're not in walking distance to one, you may have trouble getting to one depending on your subway situation.

That said, I know a few ppl whose apartments are fine, but no power for a week. They've stayed in their homes and just deal with taking cold showers. Some of my friends are staying uptown with friends just because there's warm water and it's close to their jobs.