Hello Anna and welcome back to the Disney Parks Moms Panel!
I am glad you came back to ask this great question. Like many of life's questions, the short answer is- it depends. All Quick Service locations and many Table Service locations will allow you to attend a meal and simply have a drink and/or dessert. The exceptions are dining locations that include characters or are buffet style meals.
For example, I don't think you would have any trouble heading to the
Kona Cafe located in
Disney's Polynesian Village Resort for coffee in the morning. Actually, I highly recommend their Hawaiian Kona Maragogype Press Pot. It is amazing. However, just down the hall at
'Ohana you would be charged the full price as the meal includes character visits and is an all you care to eat family style experience.
I hope this help with your planning. If you have more questions, come on back to the Disney Parks Moms Panel.
See ya real soon,
Anne