A non-smoking room (hotel room where smoking is prohibited), designated to avoid tobacco smoke and odor.
当ホテルは全室禁煙室です。
This hotel is entirely non-smoking.
禁煙室をお願いできますか？
Could I request a non-smoking room?
禁煙室が満室の場合、近くの別館に空きがあるか確認します。
If the non-smoking rooms are full, we'll check whether there's availability in the nearby annex.