The district is a prominent tourist attraction, boasting one of the densest clusters of breweries in the U.S. Will it persist, despite headwinds and uncertainty? SEATTLE — One of the first breweries to open in what is now Ballard’s brewery district took a chance on an industrial neighborhood that looked very different than it does today. When Reuben’s Brews opened in 2012, co-founder Adam Robbings said the area east of 15th Avenue Northwest and north of Leary Way had little in the way of a brewery scene. Within a few years, more breweries followed, helping transform a pocket of industrial…