Just looked it up:
“There is 4000 square feet of cabin space with two galleys. The executive suite consists of the presidents office, dressing room, bathroom with shower, and stateroom. There is also a conference/dining room.”
http://modern-us-history.suite101.com/article.cfm/a_brief_history_of_air_force_one
And there you are, a mystery of the universe unraveled.