Apologies if this is a basic question...headed out on the Dream soon. If we have a split party with one concierge room and one standard, are the concierge hallways behind locked doors? Or can anyone access those decks to meet the rest of the party at their concierge room? Not asking about accessing places like the lounge (not abusing concierge benefits), solely accessing the room to leave a message on the door or meet up at a room. Thanks!