Sadly, I will no longer be a Costa customer.
From Costa's website:
Is it possible to smoke onboard?
Smoking cigarettes, cigars and pipes is not permitted on board, except in the “Cigar Lounge” area. Electronic cigarettes may only be used cabins and in the “Cigar Lounge” area. In public areas outdoors smoking is only allowed in specially designated areas that have ashtrays. We would like to remind you that smoking is not permitted in cabins, but only outside on private balconies. To avoid the risk of fire, cigarettes must be extinguished and left in the ashtrays provided and never thrown overboard when they are still lit. We would also like to remind you that on board the ships Costa Mediterranea, Costa Classica, Costa Atlantica and Costa Victoria there are no indoor smoking areas.