Okay FINAL UPDATE, THIS STORY GOT MORE COMPLICATED:

This cat, also known as Do Right (?) was not at all associated with the guest who stayed in the room in which the cat was found. He belonged to a completely different, totally unrelated guest staying in another room. The guest from the room in which the cat was found purposely left a soiled cat carrier to be thrown away and accidentally left some litter. He came back today to show me his cat and clear his name so he didn't get banned from our hotel. The cat in question, mister Do Right, slipped past his owners to get outside without their knowledge. Now here is where the drama started: finding himself shut out of his room, he wandered down to an open room with housekeepers (familiar ladies he had met before) and cat supplies. The housekeepers, finding a cat in a room with some gnarly, used cat supplies, assumed it was an abandoned cat with abandoned cat supplies. That's when they brought him to me. The guests to whom he belongs did not realize he was missing until late last night and had to check out this morning. But they stopped by the lobby and described the cat to my manager and left contact info. I was able to get in touch with them and HE HAS BEEN REUNITED WITH HIS FAMILY! They were able to describe him in detail. I had a vet appt for him tomorrow to get him checked out (we were considering fostering or even keeping him if our housing management would let us just register him and start paying pet rent) and they intend to keep it just on principle because he was out of their care for a while I made sure they knew he had been favoring his right front paw for a while last night. So, crazy story, but HAPPY ENDING!