This is not quite Columbia Heights, but pretty interesting to me. I was surprised to see a sign for plug-in vehicle parking outside the Reeves Center at 14th and U. I guess you plug in your car and charge it up.
I found this blog post about it -- it was funded by a Department of Energy grant, and according to this website, it's one of two charging stations in the city, the other being at 425 Mass Ave NW.
Pretty interesting stuff. I haven't had a chance to see if it's actually getting used.