Even pretty legit stores operate out of containers or holes in the wall. My favorite fruit and vegetable seller operates out of a shipping container. The consulate crowd refers to it, somewhat tongue-in-cheek, as 'the container store'. These stores are also pretty handy for buying drinks and snack food - though you won't always find western brands.
This might be my all-time favorite. It's a tailor shop and I like how it combines hole-in-the-wall style with shipping container functionality. And how that picture on the wall looks like an old-timey TV.
Proud shop owner of a beverage shop.
Beauty salon and another proud owner.