A lot of folks have small house pets and can't find a good sitter to watch their pet(s) while traveling. The Harrah's Operating Company is now catering to this group and has pet rooms at most of their properties. This includes Harrah's, Imperial Palace, Rio, Ceaser's Palace, Paris, Bally's, and Planet Hollywood.
Wife and I stayed at the Imperial Palace with our french bulldog twice. First trip last December was ok and the room was clean and just acceptable. The second trip was in January and the room had wet carpeting (just cleaned) and it was next to the parking garage. So noise was a big issue. The doggy potty area is in an alley next to the parking garage. My dog would not go into it, too stinky!! Can't remember the tower the pet rooms are in, but do remember it was a long walk to the casino.
I would not recommend the Imperial Palace.
Last month we stayed at The Flamingo. Pet room was on the 17th floor in what they called a "go" room. Room was very nice and the elevators were fast. Once out of the elevator it was a quick walk to the garden area where the doggy patch was and it was very well maintained.
I do recommend the Flamingo pet rooms. Very nice.