My partner said something like The Riviera is perfect for those people who like those "not-quite-up-to-par" Holiday Inns and the like.
The only reason we stayed at the Riviera because it was one of those few hotels in Las Vegas that allowed us to stay for just one night during New Years Eve. The other hotels had a 2- or 3-night minimum.
We ended up with a smoking room, which wasn't too bad. My complaint about the room was that there were cobwebs and dust on the ceiling.
The Riviera could benefit from a facelift. Their gaming area is...ok. I was more interested to play at other casinos than at the Riviera.