The work space at the Los Angeles offices of mega-global advertising agency TBWA (a.k.a, TBWA Chiat Day) is epic and includes an indoor, park-like plaza where people can meet, hang out, collaborate, or dine. (Full disclosure, we do work for another, separate ad agency that is related to TBWA.) The space is bathed in natural light from large skylights and is part of a massive warehouse-like former industrial building that was converted into a warren of multi-level interior office structures, bridges and open spaces reconcieved for the agency culture and work style.