VIP’s, entertainers, celebrities, political figures and other high profile individuals are often brought into a hotel through the loading dock, walking through the kitchen when necessary and going to their suites using the service elevator. In addition to their traveling security detail there is always a presence of hotel security on hand who have the keys to override the elevator. There is indeed another whole level of security back of the house.
I worked in Reagan’s Western White House as a cook intern. There is a completely separate way to get around the entire hotel and towers and presidential suite without ever being in a public space, I can tell you that. The President and First Lady never appeared in public and ate in the best dining areas only when no one else was there. They used the hallways we service people used to get around, and they did have dogs checking everything out first.