Hello John23,
No it is not illegal. You can also carry in hospitals.
There are only the following restriction in Nevada;
1. Government facilities (local, state and federal) this includes parking lots and places like libraries.
2. Schools
3. Indian land
Even if there is a No Firearms sign posted, it is not s firearms violation to ignore it. It becomes a trespassing issue if you refiuse to leave if asked.
Yes you can carry in casinos, bars and restaurants as long as your blood alcohol is below 0.10%. (yes that is too drunk to drive)
The joys of living Nevada....