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If another chair will fit, ask you cabin steward to bring one for you. As for the door, many leave it open but apparently there is some sort of sensor (and I know nothing about this, never heard of it until a few months ago when I read it here) that wont allow the A/C to run while the door is open. It wont be too cold, its very nice down there especially this time of year. You might actually have the opposite problem of it being too warm. Anyways, someone mentioned something about using a magnent that tricks the sensor... but again, Im :? about that. Im planning to leave mine open, weather permitting, this next time too. For some stupid reason, I didnt think about it last time. I'll be the 3rd pax in the cabin, so I will be right near the balcony and I want to be lulled to sleep by the sounds of the ocean..... cant wait! (and for those who get uptight about running the A/C with the door open, I wont do that.... this is another one of "those" topics, Glo... lol).