Not sure if anyone knows but I figured I'd find out more here then calling Royal direct.
Usually we get the Unlimited Dining Package and just eat in the specialty restaurants and have no issues.
But we are traveling with 62 family members at the end of the month on Mariner and are doing dinner together nightly in the main dining room.
If we purchase the Unlimited Dining Package can we use it in the main dining room to order from the Chops menu (lobster and/or Filet)