Many U.S. cities have too many office buildings and not enough homes. Developers are now converting some old offices into apartments and condos, but it's going slowly.
The room looks like your typical office suite: white walls, low ceilings, gray carpet worn thin from years of foot traffic.
But for this vacant office outside Dupont Circle in Washington, D.C., real estate developers see potential.
Matt Pestronk is t... [5641 chars]