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Lucky for you cruise lines have cut back on smoking areas over the years. On Carnival in general, the only places people are allowed to smoke indoors include the casino and one or two bars/clubs depends on which ship you are on. Outdoors, people can smoke in designated areas. For example on many ships they will designate the starboard side of all open deck as smoking and the port side as non-smoking. Signs and ashtrays clearly indicate where people can and can't smoke.
