Upon arrival, a sign welcomes guests with "The Friendliest City in the World," but coming into the city it appears the center has run out of "friends" along the malecón and Morelos Street - abandoned store fronts, something unthinkable a few years ago. One empty restaurant displays a sign, "this restaurant is closed because a lack of people". Another reads, "No Sales, No People," the image is repeated over several blocks in centro. Some attribute…