A wall that has been written on by employees stands in the entry way at Facebook Inc.'s office in New York, U.S., on Tuesday, Dec. 20, 2011. "Cool spaces" will spread to U.S. cities outside major Internet hubs as tech-savvy workers across industries spend more time at work and conduct their lives from hand held devices, said Peter Rummell, a developer in Jacksonville, Florida, and chairman of the Urban Land Institute, a Washington-based trade group for investors, developers and planners. Photographer: Scott Eells/Bloomberg via Getty Images
