I used to work with a guy whose wife worked for Starbucks. He explained that they'll do seemingly crazy shit, like put stores across the street from each other, that makes sense when you look at the data. The store on one side of the street picks up traffic from point A to point B, while the other one gets point C to point D, optimizing for not making their customers walk across the street.

I think of it as similar to how UPS rigs their routes to avoid left turns.