Take a bus to the roughest part of town. Get off once you spot a hideous concrete high-rise overshadowing rows of dilapidated tattoo parlors and takeaways. Stroll along the graffiti-strewn bridges and dank subways, patting your pockets instinctively, taking in the overpowering stench of cigarette smoke and decaying garbage. And you’ll see them everywhere. Loitering […]