You get all kinds, possibly depending on when the town was established. For many of the Chicago suburbs, there is a defined "business district" where most of the restaurants, bars, barbershops, etc are. This may very well be a couple of streets that run all the way across town. Frequently, every 4th or 8th street is "arterial", and the bulk of the businesses will be on those streets. So you have a few to several blocks of "internal" streets where there is indeed only residential housing.