Where have I been? Lee the T has made TEN posts in the last year. Before you know it, she'll need a SECOND icon.

As to the question at hand, I think like many New Yorkers NS and IK eat out all the time. But just in case there's a need for the occasional peanut butter sandwich, there might be a commissary in their building. I don't know about New York, but in Chicago there are all kinds of little below-ground or inside groceries that only the neighborhood residents know about.