Some friends have recently moved into Fort Greene and I want to get them a housewarming gift certificate, preferably from a good food shop nearby. They enjoy cooking but don't always have the means to buy some of the specialty chowhoundish foodstuffs I know they like, which is why I'm opting for a gift of groceries rather than, say, a gift of a restaurant meal. They are only here for a short time before going back to Europe (so I don't want to get them housewares or appliances). Can anyone recommend a downtown Brooklyn equivalent of Murrays, Citarella, Fairway???