The old Charity hospital in New Orleans has a central tower that extends up higher than the rest of it. There are on-call rooms inside (formerly 'resident' rooms, because originally residents resided in the hospital) and on the top floor is a half-sized basketball court. Sometimes after working all night, we would go up there with coffee; you could climb out on to the parapet and look out over the city, while you let your coffee do its magic.
There is also a basketball court on the top floor of the US Supreme Court. It is called 'The Highest Court in the Land.'