We just watched a documentary on hotels this evening. The Delta Queen was one of the featured hotels and was still running at the time the documentary was shot.
The Delta Queen began in California making runs between Sacramento and San Francisco. It was pressed into service by the U.S. Navy during WWII and painted gray. It ferried wounded soldiers and sailors from return ships to hospitals in the San Francisco area.
She spent the last few years docked in Chattanooga, Tennessee as a hotel-restaurant.