|The following is based on developer test content cut from Fallout 3 and has not been confirmed by canon sources.|
WarehouseBathrooms (named Bathrooms on the local map) is a test cell in the game files of Fallout 3.
The cell is a copy of all the bathrooms in the game. It was likely created to quickly copy and paste them while making the bathroom locations.
WarehouseBathrooms appears in the game files of Fallout 3 but should not be considered canon due to it being a test cell.