Commentary PITTSBURGH—Word travels fast in places like this city’s iconic small-business district filled with third- and fourth-generation family-owned businesses, the majority of which are centered on two things: relationships and food. Relationships and food, but not politics. At least not usually, thank goodness. The relationships come not just from the generational loyalty of people repeating what their grandparents and parents did, but they also grow here because of robust word of mouth. Relationships also form when someone you trust recommends a business. And the food here in the Strip District isn’t just about the restaurants. It is also the dozens and dozens of old-world epicurean shops representing every ethnic group you can imagine. Each is filled with aromas that entice the curiosity of the shoppers to try something new or embrace the nostalgia of a time long gone but that they long to re-create. There is only one business here …