Washington DC Hilton suite bathrooms do have an inexplicable little "cubby-hole" behind them.
SAUCE: https://www.tripadvisor.com/LocationPhotoDirectLink-g28970-d84137-i149219376-Washington_Hilton-Washington_DC_District_of_Columbia.html
Another variation, (and slightly different lighting to show how much room behind the toilet there might be to store a "CHEESE PIZZA") but you get the drift. Whoever made this video did homework, and had some knowledge of the scandal.
Sauce again:
https://www.tripadvisor.com/LocationPhotoDirectLink-g28970-d84137-i38191096-Washington_Hilton-Washington_DC_District_of_Columbia.html