I agree the menu is always reflective of the "elegant" ambiance.
The formal nights are always my favorite, sitting in a beautiful dining room surrounded by people dressed in their best and sampling foods that I do not eat at home. It is like being transported to another time!
Bring one dressy outfit and go to the first formal night, if you enjoy it than you could always where the same outfit again no one will notice or care !
Enjoy ! Vacation is a time to do what you don't normally do all year round!