Greenbelt, the first of such communities was built in Maryland between Washington DC and Baltimore. It was a bold experiment in co-operative living with all the town's businesses and even the newspaper co-operatively owned by the residents. The homogeneous houses and flats where built around a city centre that included shops, a theatre and an Elementary School.
The City of Greenbelt website
Historic Greenbelt Walking Tour Trail Guide, created by the Greenbelt Museum, reprinted 2011