It depends on if the ship is full or not. I would suggest that you board the ship as early as possible and visit the customer relations desk (purser's desk). Let them know just what you posted here and ask if there are any upgrades available. Depending on how full the ship is, they may offer you a great deal, as any additional revenue is found money.
However, if the ship is full (or close to it) you probably won't be offered a "special deal".
On any occasion, have a great cruise and a happy 60th birthday!