The only thing I found in the Carnival FAQs about smoking relates to the Carnival Splendor.....which is as folows:



Is there a smoking policy for spa cabins?
Smoke Free Policy - Spa Staterooms (Carnival Splendor)
Carnival Cruise Lines has designated the Spa stateroom and suite accommodations, inclusive of the balcony, as an entirely smoke free environment. Guests booked in a Spa cabin agree to strictly comply with this non-smoking policy and refrain from smoking or allowing any other Guests from smoking in the Spa cabin. To preserve Spa standards and ensure staterooms and suites are free of smoke residue, Carnival will asses a $250.00 reconditioning fee per spa stateroom or suite for guests that do not comply with the non-smoking policy. This charge will be applied to the guest's Sail and Sign account.



I'm sure some of our frequent Carnival cruises will be giving you some first hand info.

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