If it is an all adult party..Artist Point has the pre-fixed menu which allows you 4 courses for $49 per person. The food is fantastic, service fantastic and great atmosphere. Quite nice for an after wedding dinner.
That is probably as close as you get, if you plan on doing the whole appetizer, salad, entree, dessert thing.
Other than that..a buffet would defiantely be your best bet. Now for lunch/dinner..out of the parks, because you didn't say if everyone would have park admission, which they would need in order to eat in the parks with you.
Buffet suggestions;
Lunch..Fresh at Dolphin is suppose to be great.
Dinner...Boma would probaby be my first choice, then Chef Mickeys. There is also the clambake at Beach Club which might be nice.