Photodom

I was just wondering if anyone had booked their cruise and after they had arrived on board, asked if it was possible to get a room upgrade? I was thinking along the lines of upgrading from a Balcony cabin to a Suite. I am traveling on Azura later in August and in some of the videos I have seen, the Balcony Cabin looks a bit small. I travelled on Queen Elizabeth last year and the cabin was much larger. Just curious.