The first errand of a long stay is almost always groceries. Our suites have kitchens, so most people walk out on day one looking for coffee, milk, fruit, something for dinner, and they'd rather not carry it far.
Good news: you don't have to. We're at 17 John Street, three minutes on foot from the Fulton Street subway station, and there are four proper food shops inside a ten-minute walk. They are not interchangeable. One is a full-size supermarket with a produce department worth the extra blocks, two are neighborhood markets you can nip into in slippers, and one stays open until midnight. Here's how we'd use them.
One thing to know about this neighborhood before you plan the week: the Financial District empties out on weekends. That's quieter streets and shorter checkout lines on a Saturday morning, which is the opposite of most of Manhattan. If you're cooking for a group, shop Saturday, not Friday at six.