An "insider" tip is to have an al la carte lunch at Sushi/Raw, they do serve non-seafood dishes as well. We aren't huge fans of most of X's food and enjoy eating as many meals as possible on land restaurants including on embarkation day
Besides Zeniths and B2Bs, someone correct me if I'm wrong, AQ is excluded and while suite guests have the option to dine there, like any other meal, you'd be better off going to Luminae over the MDR