

Could Second Class/First Class go through these doors on the C-Deck Promenade?
Was perusing around THG's Project 401 Demo and found these doors at the front of the Second Class C-Deck Promenade. Of course, in the game you could go through these doors and be sent straight to the First Class accommodations forward of this door. I'm wondering more of if it was possible for a First Class or Second Class passenger to sneak through these doors during the voyage and go into the opposing class's accommodations or if they would have been guarded or locked during the voyage.
(And I guess for my curiosity, if these doors were locked or guarded, would there have been other places that Second Class and First Class could pass through into the other class's accommodations during the voyage?)