Understanding the food distribution system of Athens is a challenge. Similar in size to Metro Detroit, at slightly more than 4 million in population, their system is much less concentrated. Food is sold in a bewildering assortment of venues.
After hanging around the ruins in Athens for a week it's fascinating the way they weave through the fabric of the city. Constructing anything new must be a monumental headache when every excavation for foundations might reveal something significant from one of the many cities that have been built in the same place.