SuzyQ, I'm sure you can smoke in the cabin. Carnival's not going to punish or penalize you if you do, but as a courtesy to the other guests, you shouldn't. What if the guests booked in the same cabin as you, on the next cruise, have small children with them and they don't want them inhaling this. As I stated in my previous post, I am a smoker, but I also understand that it is very unpleasant for some people and I respect that. It is because of people like you that some guests get off the ships complaining about old, musty cigarrette smells in the cabins and lounges. And it's not just the smell; As I mentioned before: luckily I haven't been in a cabin that smelled of smoke, but I have seen cigarrette burns on the carpets and mattresses. Carnival spends too much money refurbishing these ships for our enjoyment and it's a shame some people don't take care of them.