Note: I don't go to places like this as a guest... I'm always the entertainment. That said, I've seen many many different event venues over the years.
Atlantis is essentially a 1960s inspired glass floating square fishbowl.
The views "can" be great if you don't cheap out on the room and book stupid early to avoid having to look at the hippo bus trundling along or the paddle boats.
While some of the rooms can be dressed up nicely, some of them look the the used and abused 60s clap-trap that they are.
It's rough.