Speaking of streetcars: PCC car in San Francisco painted as a DC Transit car

Also see "A National Mall-focused heritage (replica) streetcar service to serve visitors is a way bigger idea than a parking garage under the Mall" (2013) and "Adding cultural heritage dimensions and expanded service capabilities within commercial districts to DC Streetcar planning" (2006).

DC Transit figured out how to air-condition a PCC car with the Silver Sightseer.  I don't think SF has bothered to add a/c to their cars.