time to clean up

I have family company coming for Easter dinner so I need to get some apartment cleaning done.  My basic attitude toward house cleaning is "Thank goodness I have company over every once in a while or it would never get done." That's not quite true but pretty close. I read an interesting fact yesterday. Buckingham Palace has 775 rooms including 78 bathrooms. 775 - 78 leaves 697 non-bathrooms. I'm wondering how many of those rooms are bedrooms. Assuming one in four are bedrooms (in my old house it was one in three) that gives them one bathroom for every two to three bedrooms. Not too bad I guess. My real question is how do they organize the cleaning of all those rooms. Do cleaning crews clean the same rooms over and over again or do they rotate for some variety. Are the rooms nunbered for easy identification? I can envision the early morning doling out of assignments. "Team 3, you have rooms 27 through 122 today." and so on. I've only ever seen Buckingham Palace from the outside.  When I was there last year the flag was flying over the palace indicating that the queen was in residence so we couldn't go inside. I'll just have to assume it's always clean since they always have company coming.  Maybe I'll get inside on my next trip to London. I'll be sure to take my white gloves so I can check up on their cleaning.