The barracks area is large, having a vast amount of things for a shinigami to do on their day off, including a snack bar from which you can buy food and drink. This is basically an area for rest and relaxation.
The upper level to the barracks is a housing complex for all the shinigami in the squad. Each room is identical in that they all come with one bed, a desk, and a couch. You may customize your room as you like.
The rooms are arranged in order on the left for the seated officers, unseated officers will spread themselves out through the rooms on the right side of the hallway.
Both Seated and unseated officers alike are housed here, to help encourage unity and teamwork. These are your comrades, I expect that none of you will disagree with this arrangement.
