The DC Shared Space Initiative, a donor-advised fund of The Community Foundation, is a joint project of Tides Shared Spaces, GreenSpaces Development, and a group of District-area philanthropist/activists. The Initiative is working to create high-quality workplaces in which diverse local, regional, and national nonprofits can collaboratively engage in their daily work.
The DC Shared Space Initiative is designed to help nonprofits in several ways:
-- controlling office/facility costs
-- creating long-term stability and efficiency
-- sharing space with other organizations that share your mission and/or values
More info here.