NCL now allows the Latitudes coupon to be used in almost all restaurants!
Here's the link for Latitudes' T&C's
https://www.ncl.com/latitudes-rewards-program
(However take note especially of 6 that I added below!)
6 Benefit is available on sailings 5 days or longer, and entitles each guest to an appetizer, one entrée and dessert of choice. Upcharges apply to certain premium menu items; Raw Bar Seafood Platter is not included. Bottle of Wine offered in all venues offering Complimentary Wine list, Palomar not included. In à la carte restaurants, coupon can be redeemed for 4 menu items per person (Sushi, Wasabi, Nama, Teppanyaki, Hasuki, Food Republic, Pincho Tapas Bar or Raw Bar). Additional entrées will incur supplemental charges. Dinner coupons are non-transferrable. Solo guests cannot claim two dinners. Coupons can’t be used for the same venue twice. 2 guests maximum. Dining options vary by ship.