I can only tell you about the last cruise ship I went on, in November 2008, this was the P&O Aurora, although I don't smoke, I read the literature placed in each cabin which states that smoking is allowed in all cabins.
I would however advise that if you do wish to book a cruise, it would be best to contact the cruise company direct, before you book, to get the latest applicable conditions/restrictions which can change.
I do hope you find what you are looking for.....Bob.
Have a look at this link /cruise-guides/smoking-policy/ It gives you a general idea but may not be up to date as things are changing rapidly, so check with cruise line e.g. P&O will be non smoking anywhere inside from April on all ships. Brian .
The majority of ships are non smoking in cabins. If your so obsessed, I would look at Carnival, NCL who cater for the American market & Costa who cater for the Italians. These will probably be the last to submit due to the nationalities they cater for. Be aware that these rules are rapidly changing within the industry & I wouldn't bank on any rules being in place for too long. P&O have banned smoking on 3 of their ships so I would think it's only a question of time for the rest of the fleet......Wilba.
There is a summary on this webite if you click on "site map" and go down to smoking. This is a little out of date as things are changing rapidly. All P&O ships will be smoke free in all inside rooms and cabins from the start of the European season this year. Smoking will only be allowed in designated outside areas. Brian.
Have just returned on QM2 (see review on QM2) and empathise with you absolutely. Joy of this ship is that it has a 'pub' on board which allows smoking in one area when not serving meals. It was wonderful to have a drink and a cigarette in the warmth in a pub atmosphere (just like in the good old days pre UK ban). I booked this ship because it is one of the few who allow smoking in the cabin as well as the balcony although there aren't many outside areas on deck in which one can light up now. Even the casino had 2 non smoking nights out of our 11. I really feel that we smokers are beginning to get a very raw deal and it's about time the cruise companies realised they are probably going to lose a lot of potential first time customers if they don't publish their smoking policies and stick to them. I personally, am very loathe to book my next cruise until much nearer the date of departure when I will hopefully know what the smoking policy is of QM2.