From a safety standpoint, it is important to keep track of your room keys, make sure your hotel room door is always firmly shut and utilize the safe in your room to keep valuables. While Las Vegas is generally safe and hotels go to great lengths to protect their patrons, crime does still happen and visitors here can be easy marks. Always be vigilant and aware of your surroundings.
In Las Vegas, it is a crime for someone to have unauthorized possession of a hotel key under circumstances which demonstrate the person’s intent to commit a crime (for example, burglary, prostitution, theft or drug crimes). It is a gross misdemeanor and often persecuted with the other crime committed. NRS 205.900.