All of them except for Ghirardelli (there are some reports of using snack credits there), Wetzels Pretzels, the beverage kiosks and the AMC Theatre dine-in. All are one credit except Fulton's and the Wolfgang Puck Upstairs Dining Room, which are two.
Call T-Rex for reservations, you are more likely to get what you want that way than you are reserving through Disney.