Sounds like "none" is exactly accurate, but I'll take it that "rare" is the norm

(for some reason multi-quoting is not working for me, but I've copied the text from docbert just above:

"Had a quick one-night stay here last night. Booked only about an hour before I arrived so I hadn't been upgraded, but at check-in they upgraded me to a Tower room, including access to the Tower Lounge.