That's an interesting one. I didn't think much about local/brick and mortar businesses. I bet there's a whole other set of pitches that work for those.
The thing about those is that ultimately the city-by-city approach is a distribution strategy. A single jamaba juice can exist on its own.
For Uber or 42Floors to succeed with venture backing, they really need to dominate a large market (like all major cities in the US). Thus the pitch still becomes much more high level and not focused on individual units.