Make sure to make your Tchoup Chop reservations as soon as you can. They book up for dinner pretty far in advance. We also booked them at opentable.com With Mythos, we usually stop in when we are at IOA in the AM and make our reservation for dinner that night. For lunch, we just go at an off time and have no problem being seated right away. You room key helps at the restaurants at the parks and City Walk (NOT at the hotel restaurants), but if a lot of other hotel guests are there ahead of you, you will have quite a wait.