i found out that the best possible layout i have ever worked on is a large corridor in the middle, with closed offices for each squad on both sides ( meaning mini-open-offices per squad ) isolated from each other. The offices are separated from the corridor by a glass wall and glass door. Each squad work around a large table ( for 8 to 10 people ), with wall to wall whiteboards ( the walls between offices ) and a wide screen TV for presentations.