Walk into the D on any given night, and odds are good that you’ll find Derek Stevens there. He’ll be the big guy at the Long Bar, possibly buying a drink for a new acquaintance and likely wearing a jacket designed to make it impossible for you to miss him. It may be a color you’d normally see on a muscle car, or maybe two-tone, or maybe with lapels as wide as the mouth of a martini glass. Stevens and his brother Greg own the D, as well as the Golden Gate, the Downtown Events Center and the property that ...