Originally Posted by
goldenbear
Seems a very small risk compared to when a room is being service. See something valuable (laptop, ipod) through the opened door, flash a room key, say you forgot something, and off you go.
Good point. I think many large hotels are aware of this possibility. If I stop by my room while it is being serviced, I've been asked to produce my card key and show it works in the door before being allowed to enter (most recently at the Marriott Marquis in February).