As first reported by Eater, the craft-beer-fueled Las Vegas-based Holsteins Shakes and Buns has been gearing up to open in Portland since fall 2015. It takes over the massive 6400-square-foot space at 1139 NW Couch St. — right in the heart of the Pearl — and Holsteins now tells Eater it is prepared to put patties to the griddle on May 1.