A number like 84x suggests that it's basically zero now. That kinda makes sense. The only one who would notice is the cleaning staff, and relying on their word for "it smelled like smoke" sounds like a way to get a chargeback. They'd call you on it only if they were forced to take the room out of rotation to air it out.
So maybe there are a lot of people smoking just a little (perhaps a joint), and getting away with it. That might make a number like 84x work.