They are everywhere. That one corner of an intersection where no store succeeds, while the other three corners thrive. In Chicago, I think of that haunted house at Halsted & Belmont. It was a clothing store, a hair salon, thrift store. No one could make anything stick. There are similar places I see here. A print shop closed and an upscale men's clothing boutique opened up, but doesn't seem to be faring too well. Retail is tough.