Currently I live in Alphabet City so the main areas I were thinking were places of transitions-- so setting up a canvas or screen over vacant properties that are slated for redevelopment or government owned; side walk sheds and the sides of construction projects (even housing projects which are just burdened by the sterile-ness of outdated design).
If not there then plazas that are currently under utilized or unmaintained such as the one mentioned above by the Tribeca trust. Ultimately, this idea is very flexible and can take on a lot of different forms depending upon what particular type of participation is being encouraged.
For areas such as vacant spaces that are contested projecting light in a way that allows people to express what they want in the space similar to that of Candy Chang's works (but with light)seems appropriate whereas in a plaza setting the type of lighting and design would be different
I'm running out of characters so I look forward to hashing out ideas tomorrow!
The power of light is one that is often forgotten in urban design. I'd love to hear more about 33 Thomas. Shoot me an e-mail at email@example.com.