The Salt Lake Temple Administration Hall
The Administration Hall is located on the next floor of the temple, just above the ordinance and sealing rooms.
A large portion of this floor is taken up by the top of the Celestial Room. The rooms adjacent to the administration hall include the First Presidency Room, the Council of Twelve Room, and the Seventy Room, and the Dome room (named because it's taken up by the domed ceiling of the holy of holies below. It's used as a locker room for the general authorities to change into their white clothes).
These rooms are used by the general authorities for the weekly prayer and administrative meetings they hold in the temple.