A standard professional musician's "sleeper coach" or tour bus typically accommodates between 8 and 14 people. The most common configuration for a single-deck bus is 12 berths (bunks), arranged in stacks of three (triple bunks) along a central hallway. High-capacity double-decker buses can sleep up to 16 people. These bunks are often nicknamed "coffins" because they are narrow, enclosed spaces with a curtain for privacy, a small reading light, and sometimes a personal entertainment screen. In addition to the bunk area, most tour buses feature a "front lounge" for socializing and a "back lounge" which is often reserved for the star artist or tour manager. Some luxury star-coaches may sacrifice bunk space to include a master bedroom with a double bed and a private bathroom, reducing the total sleeping capacity to 4–6 people.