I think that it's kind of mistaken to attempt to put this whole thing in terms of 'neighborhoods and restaurants'. It's just not the same as on line businesses which purvey information goods.
The marginal cost of an information good is usually zero or quite low, food costs something. Food is not easy to replicate, information goods are super easy to copy and distribute. 37signals' products are used worldwide; Beppe's Trattoria is really only available to people within a short distance.
