Yet unlike design-friendly cities such as New York, Miami and Milan, Philadelphia loathes showiness, reflecting its Quaker heritage.

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Players can choose to build friendly relationships with other cities or form an intense rivalry through a dynamic and ever-evolving friend and foe system.

ENGADGET: EA opens SimCity Social on Facebook, really, really hopes you'll 'like' it

New York and London have taken their places on the global stage as the cities most friendly to new talent, and there are plenty of fresh faces fighting for the spotlight.

WSJ: Fall 2013 Trends to Look for at New York Fashion Week

This year's World Environment Day, which will be hosted by San Francisco in California, US, will focus on ways to make cities more environmentally friendly and resource-efficient.

BBC: NEWS | Science/Nature | Changing planet revealed in atlas

Mr Opik says it is very flexible, convenient in rural areas as well as large cities - and environmentally friendly.

BBC: Opik and peers in Segway protest

Today is game day, and as the Baltimore Ravens and San Francisco 49ers get ready to take the field, the mayors from those cities are taking a different approach to the traditional, friendly wager.

WHITEHOUSE: San Francisco and Baltimore Mayors Put Service on the Line for Super Sunday | The White House

Cities around the world have been encouraging residents to adopt a more environmentally friendly, less expensive method of commuter travel: the bicycle.

FORBES: The Greener, Cheaper Way To Commute

Adding inactivity to injury, this is especially true in locations where many people exercise accompanied to music, airplanes (hey, it's hard to return those seats to their upright positions), the New York City subway system, and the streets of cities other than Mountain View, CA. Indeed, most WiFi-friendly environments are also laptop-friendly and thus support access to not only Yahoo Music and its competitors, but high-quality free internet radio from last.fm, Slacker, and others.

ENGADGET: Switched On: Music in the air (Part 2)