Yes, Club Orange is included (no extra sur-charge) for Neptune Suites guests or anybody that purchased Club Orange during their booking process. Again, you may already know this, the Club Orange stand alone restaurant is only on Holland's Pinnacle class ships. At this time there is no separate restaurants for Holland's other classes of ships.
I'm not sure if Holland still does it, but breakfast was done at the Pinnacle Grill for Neptune Suite guests in the past on the other classes of ships.