The Centre for Social Innovation in Toronto is located in a historic building and has recently purchased a second one. The Centre uses the spaces for shared and individual offices with a focus on social innovation.
The Centre has just released a set of three free books (also available in pdf) which tell their success story, and give tips to others who may want to use the same model. The books focus on the story of the Centre for Social Innovation, how to create a shared space and how shared spaces are changing the world.
The concept of shared spaces has also been utalized in a historic building in Guleph: 10 Carden Street.