It’s a typical afternoon in Berlin-Wedding, not far from Leopoldplatz. The radiant early-spring sun is shining down, so much so that the Turkish barber has put a rack of wet towels out on the sidewalk to dry. In contrast, the cigarette smoke at Cafe Morena hangs heavy in the air. Wolle, the tavern’s retired proprietor, and Paule, one of his regulars, are drinking their morning beer in the still-empty pub. …