The person who helps you order at lunch (at a video screen) wouldn't care at all if you only ordered 1 dessert. I went twice late August, and both times ordered one entree (for me), and one dessert (for DS), nothing for other DS (he ate the side dish that came with my entree), and no beverage (I got cups for tap water - from the soda machine - free). Wasn't frowned upon or commented on at all. Neither the order helper/taker nor the person who brought us the food cared at all what we ordered - they were all very, very nice. Enjoy!