A deck level photo of the poop deck with a view of the stern docking bridge and various ventilation funnels. Note the passengers benches.
(Above) Third class passengers enjoying the sun on deck. (Image: Father Browne Collection)
Third class passengers had two locations to access if they wished to go on deck. The stern (rear of the ship) area, also referred to as the "poop deck," and the forward well deck up at the front of the ship. The 3rd class passengers were separated from each other in the sense that married couples and single women and children were housed aft in the ship, and single men were housed forward near the well deck.
Unlike the movie "Titanic," where Jack and Rose stood at the extreme bow of the ship, passengers were not allowed forward (forecastle area) of the breakwater on the well deck. That forward forecastle or "fo'c's'le" (pronounced fok-sul) was an dangerous area.; the anchors and anchor chains, bollards, cranes, cables and other machinery were located there. In rough seas a passenger would be swept right off the deck where Jack and Rose stood in the movie.
So, the women, children and families would have had the poop deck and aft well deck to themselves and the single men would have had the forward well deck and aft section of the forecastle to themselves.