I updated to the 5.6 version, but upon opening the game neither Kim nor Maria has called me regarding the new gym feature. I did have a bit of trouble with the update, it only went to 71.9% and then it stopped there but when I closed it and opened the KKH app again it went right to the game. I have Abu Dhabi, all the new clothing (YAY!!!!!!!!!!!!) and I can see the gym, but it's locked.
I was suggested that I go to Maria's office and I did that, but Kim was not there either and Maria's speech bubble was the standard one asking if I wanted to change my name.