Urban Fare at a gas station?

David Sucher on his City Comforts blog asks an intriguing question:

 So where is the “high-end” mini-mart?
Obviously it would be in and adjacent to high(er)-end neighborhoods, of which there are plenty. So why don’t they exist? Selling better products in a more comfortable environment? GREAT take-out food, nice landscaping & lighting etc. Ya know, Vivaldi playing in the background. Why not? Seems like an open market-niche. And the marginal cost of the more comfortable retail environment is trivial. Everyone knows you pay for the convenience of a “convenience store.” So why not make the environment more attractive?