Chicago – Hey, man. Hey, man. What you need?” The question is part solicitation, part challenge, and the challenge part is worth paying attention to in a city with more than 500 murders a year. The question comes from a young, light-skinned black guy with freckles. We’re in the shadow of what used to be the infamous Cabrini-Green housing projects, only a 15-minute walk from the Hermès and Prada boutiques and the $32 brunch at Fred’s that identify Chicago’s Gold Coast as highly desirable urban real estate, a delightful assemblage of Stuff White People Like. Just down Division Street from the …