inside a three-story-high, gymnasium-sized room shared with dozens of freelancers and entrepreneurs, giving the space a pulse that would be hard to replicate in a standalone office for ten people. It was once the trading floor of the Minneapolis Grain Exchange; today, people call it the "brain exchange." Officially, it's the CoCo Coworking and Collaborative Space, which has fast become a social and networking hub for Twin Cities entrepreneurs and freelancers