I’m not a smoker but I think I’m qualified to answer.
For indoors, there’s a place called the Connoisseur Club, which is devoted to smokers, including cigar.
Outdoors, smoking is allowed on one side of the pool deck, as well as aft on some of the decks, and I believe on port side of the promenade deck. In reality, there are rarely any smokers outside at all. The most are on the one side of the pool deck. Perhaps somebody can verify my recollection.