Sasha, This is a great concept! I think there is a lot of overlap to look at in the pedagogy and techniques employed by existing informal learning environments (e.g. Exploroatorium, 826 National) that are rooted in experiential ed. I think tying in to the existing spectrum of learning environments (formal, informal, blended and co-created) is critical to the scalability and long term impact of Lab21.
I also like the idea of taking the idea mobile, putting it on wheels so that it is accessible to a diverse set of audiences. Perhaps a small scale version in a food truck that acts as an entre to the main physical space, enticing those who may not normally be inclined to engage to get involved.
I love the example of the HUB for two reasons: - It is a co-working space as opposed to "office space", building a community, providing instant collaboration opportunities in cities where it might be difficult. - It is socially oriented, I think it will be important to support a specific type of development (in this case social) rather than general business development in order to not only generate a sector of work but to build up the surrounding community simultaneously.