One of the nice things about the Tropicana rooms was that they all had room safes. I see on the Riviera web site that only the premium level rooms are advertised with safes. It's probably worth asking when you reserve your room if it has a safe as most casino hotels don't have enough safe deposit boxes at the front desk or cashiers cage for all convention members. Leaving your traders or your purchases from the show in your room when the maid cleans up is NOT a good idea unles you can secure them somehow.