When the new J class service was being trailled.... Dine on Demand was trailled in Business Class... And proved to be very difficult to handle. The only service that is offered as Dine on Demand is the Light Bites service on ULR flights. All others are eat now or dont. It is entirely upto the the crew serving you on that day, if they wish to offer you Dine on Demand. But the official answer from Emirates is Business Class is not Dine on Demand. I have it written in Black and White on the information we were given when the new service rollled out.