Rob,
Thanks for your question. So typically no, the entrees at a quick service venue do not include a beverage. The kids meals, however, typically do include a beverage. You can check with the menus, one at a time, by going to the individual restaurant pages. But as a rule, adult entrees do not, and kids menu entrees do.
You can also consider getting one of the
Disney Dining Plans. The
Disney Quick Service Dining Plan, for instance, will include a nonalcoholic beverage along with an entree at each meal.
QUICK TIP: If you are like me, and keeping an eye on your budget, do remember that at any counter service restaurant you can ask for a glass of water, no charge. I will do so, even when not sitting down for a meal, to stay hydrated. So with your meal you can do this and keep that budget where you need it to be!
Have a Magical (and delicious) Vacation!