Smorgasburg Los Angeles runs every Sunday from 10 AM to 4 PM at ROW DTLA, an open-air market and arts complex in the warehouse district south of the Arts District. The event is a West Coast outpost of the Brooklyn original — the largest weekly open-air food market in the country. On any given Sunday there are 50 to 80 food vendors, almost all of them small independent operations selling a single signature item. The variety is genuinely broad: Japanese milk bread, birria tacos, Nashville hot chicken, Hawaiian poke, Filipino ube desserts, Korean corn dogs, birria ramen, artisanal ice cream. Many vendors are pre-restaurant — this is where they test …