Have you looked at your bill? Aren't room numbers usually on there?

More on topic, I think we would all be horrified to find out which hotels have had instances of bed bugs. I personally stayed at a property a while back and after developing a bumpy rash swore I had gotten bed bugs at the hotel. I never took it up with the hotel but I was really glad I never did because it turned out that I had a delayed reaction to poison ivy after having worked in the yard the day before I stayed at the hotel.