I believe the Mouseketeer Club at CR closed back around 2004. Since it was located on the first floor where the old arcade and food court were, and that area is being completely gutted, I doubt if it's coming back any time soon. They do have a Mouseketeer Club at GF, and there are facilities at WL and Poly too, as well as at the BC. You can use the facilities at other resorts than the one you are staying in. For example, if you want an adults dinner at GF, you can take them to the GF MC, go have your dinner, and pick them back up when you're finished.