We go to WDW every Christmas as a party of 10 and always make Garden Grille one of our lunch stops. They handle large parties very well, since they have huge booths to accommodate. And when the characters come around, they spend a lot of time with the group giving us plenty of opportunity for pictures. As for the room revolving, you will not even notice it unless you fix your eyes on the outside wall. You will be so busy eating and having a good time that you will suddenly look up and see that the scenery has changed. Believe me, there is no sense of motion. Go and enjoy.