Rocky, if you do decide to find any books that give you an accurate depiction of the Second class smoking room, I would suggest trying to get my hands on a copy of Titanic: The Ship Magnificent if you haven't already done so. If you haven't and they don't have it at your local library, see whether or not your library does Interlibrary Loans. That is where books are loaned from other libraries for you, sometimes with a small fee. However, it is a great service. I recommend it for researching.
Have fun researching for your story, if that is still what you are looking at.