Well you got me on the piano bars but as far as Ethiopian food goes there are dozens in my relatively walkable city and I just spot-checked the first car-choked blasted expanse that came to mind (Phoenix) and there are only five in a much larger metro area.

If I was an Ethiopian restaurant owner would I prefer a restaurant in a dense neighborhood with five families living in apartments right on top of me, or would I prefer to be in a strip mall at the corner of an American suburb with nobody in walking distance and only a few hundred families within a mile? I know which one I'd want.