Fancy South Korean grocer PK Market to open first U.S. store in downtown L.A.

At popular new supermarkets in Seoul, customers can do more than order a prime cut of meat, trimmed to their wishes. They can sit down at a small eatery in the meat department and order a grilled meal, or dine on tempura and sushi where fresh seafood is sold.

Mixtures of groceries and casual dining…