THE setting could have been any typical Central European beer garden. There were long rows of wooden tables stained in dark, rich hues; half- and full-liter beer mugs hanging from metal racks; and two beautifully crafted brass decoction tanks used for mashing traditionally brewed beer. But on this warm afternoon in November, I wasn’t in Plzen, or Munich, or Bruges. I was at the Hoa Vien Bräuhaus in Ho Chi Minh City, Vietnam.