The Transition Assistance Program (TAP), an outreach mission of the Chevy Chase Presbyterian Church, provides direct services to working and unemployed, often homeless individuals who come to the church for assistance.
Check out the webpage describing their work, and also offering a chance to volunteer!
This is a great example of a group of churches working together beyond denomination to serve a neighborhood. Capital Hill Presbyterian Church is NCP's represenative in this effort.
Check out their website and check out all the great work they are doing right in the shadow of the US Capital Dome.