Just a reminder that the No Smoking in Cabins goes into effect December 1st. If the cruise starts prior to that date it will go in to effect on the next cruise. Smoking will still be allowed on Balconies with the exception of the Spa Cabins.
Cabins are not designated smoking areas so I'd say the answer to your question is no. Granted there is no odor or smoke from one of those things, but if a crew member or other passenger happened to see you using it in your cabin they could report it.