I have been on Spirit of Adventure and am pretty certain it is a no smoking in any area ship. I certainly never saw anyone smoke and never was aware of nicotine smells anywhere on the ship.
I'm afraid it's a regular occurence as the port side of the Yacht Club lounge is the below decks "designated smoking area"(ie unrestricted) Smoking in half a room is patently absurd so this smallish area soon fills up.
Coincidentally I have this very day received a letter from Spirit of Adventure on this same subject. They state that they have changed the smoking policy recently "in response to customer feedback" and imposed more restrictions but they admit that the present situation is a "compromise". They say "these (new) arrangements have been well received by the majority of customers". Not so - the truth is that the vast majority, maybe 280 out of 300 passengers(?)did not smoke on our cruise and naturally most objected to it - some very strongly. It's a sad (and inexplicable) business because it's a cracking ship in all other respects.(You'll find details of smoking arrangements in the Spirit's terms & conditions small print.
I sympathise with your concerns. I haven't been on Spirit of Adventure, but I know that all the Thomson cruise ships have a very limited space in which smoking is allowed . This made the cruise very pleasant and will encourage me to go on their ships again.
We ccruised on the Spirit of Adventure for the second time earlier this year. On both cruises there was a smoking area in the Yacht Club but this was strictly controlled.
The area became no smoking when events and lectures were taking place.it is worth mentioning that the Yacht club is also used by ships officers as their wardroom bar and many of them were nicotinics.
We did not experince any problems with smoking as most smokers used the open decks.