A (my) bunk. Where the musicians and crew are sleeping. It's like a personal sleeping coffin with a curtain, light and sometimes a vent. Some older busses has windows (not good if the bus rolls in an accident) and the older ones don't have the "seat belt".
The bunk area. Our bus has 18 bunks. The bunks are usually on double decker busses stacked two and two, one top and one bottom. But can also be three, bottom, middle and top on single deckers. There is a narrow aisle between the bunks. They usually come in sections by four (or six).
The back top lounge. Behind the bunks. For hanging out. TV-set and games, dvd, stereo. A fridge.