I have seen them at all the food courts where we've stayed and seen them on most of the hotel restaurant menus, in addition to Chef Mickey's and the others noted above.
Almost all of the restaurants that serve breakfast serve waffles and if they are waffles, they are going to be mickey waffles. The only exception i can recall is the pop century has waffles with the pop logo on it instead of the mickey shape. but they may have kids ones that are mickey shaped. but i would say every buffet had mickey waffles.