Absolutely. We go to Chefs de France and order 2 apps as our "meals". I love their French Onion soup so that is what I get, DH orders a flatbread.
Same goes for Toyko Dining, you can just order a sushi roll or two. Don't worry, they won't say anything to you, it would be rude if they did. In our experience the servers at any restaurant are nice, with the exclusion of maybe Whispering Canyon Cafe or 50s Prime Time - and they put on an act for entertainment purposes there.