Currently in the UAE, where I have discovered that mall walking is a serious activity (The Mall of the Emirates in Dubai offers such service):
According to about.com, the advantages are:

Out of the weather: Inside a climate controlled mall, walkers can dress comfortably and not worry about wind, rain, snow, ice, heat.
Away from the traffic: No intersections to cross, broken glass or bushes obstructing the path, auto fumes or rush hour.
Security: Walking with others and with mall security on duty.
Restrooms and water: always nearby in the mall.

Walkers get a jump on other shoppers as the stores finally open in the morning, a big advantage during the holiday shopping season. No wonder mall merchants support walking programs, it ensures loyal customers who return several times a week.

Free blood pressure checks, low cost or free cholesterol screenings, presentations by health and exercise experts are other perks for mall walkers. The mall walking club may organize to take groups to charity walking events or other organized outdoor walks.

PS: The Mall of the Emirates is the one with the ski slopes:

Seen with Oren on the streets of Copenhagen… I can’t but share it with you… Have you ever seen an espresso machine on a bike before??? Ole, is the driver. He was working in the coffee industry before. Now he designed this mobile coffee shop “Welcome to my lounge” he says. “Tomorrow there will be music… Some Bossa Nova. Bossa Nova and coffee, or Jazz… there isn’t anything better really!” “In big coffee shops, the coffee is not as fresh.” Ole buys his coffee from 3 local shops (Roasted there) in Copenhagen. A friend helped him build the top of the vehicle. The bike? A company designs these kind of bikes. In the trunk on the front of the vehicle, he has 300(?) cups… I have tasted: THE COFFEE IS A MIRACLE!

The LUKYSTAR links Chinatown, Boston (now, as you would do if you where to take any other company, you depart from South Station which is located at the edge of the neighborhood) to Chinatown, New York City and at a price defying any concurrency, US$30 round trip (The price of the Chinese bus used to be $20; the price of the Greyhound dropped dramatically, from approx. $80 to $50 round trip). Certainly the fact that this bus links these Chinese neighborhoods shows the transportation overlay in function of trajectory, affiliation, spatial identity or proximity.

Usually the Chinese bus stops half way (The travel time varies depending on traffic and weather conditions from approximately four hours to five and a half hours) at a I-do-not-know-if-I-can-qualify sandwich place. Now, the LUCKYSTAR stops at a Chinese restaurant, with no name on it. However, a sign clearly indicates “Bus costumer restrooms” and “Food, drinks & ice cream”. To go to the restroom, you pass in front of an incredible display of food (good quality/price, certainly tastier than the sandwich place!), a Chinese buffet. The restaurant is clearly an obligatory extension of travel, again linking mobility with consumerism.