Fallout: New Vegas locations project
The guard barracks have 6 bunk beds; 3 on each side, totalling 12 bunks. There's an empty footlocker at the foot of each bed. A bathroom is located at the rear of the sleeping area, with a med-kit to the right of the door. Two lockers flank the bathroom door, one on each side.
The guard barracks only appear in Fallout: New Vegas.