The Dark Star Lounge is a location on the Citadel. Located in Zakera Ward's Mid-Wards District, this lounge is located on the 28th level of a building. Attractions at the Dark Star Lounge include dancing, a wide variety of drinks, and gambling. An advertisement for this lounge can be heard on the 27th level. The turian bartender has been serving drinks for eight years.
In this lounge, Commander Shepard can speak to the Presidium Groundskeeper while completing the Citadel: Krogan Sushi assignment. At the bar, the Commander can order a series of drinks, starting with an unnamed liquor, upgrading to batarian ale, and finishing with ryncol. Once they have all been drunk Shepard will pass out and come round in the lounge's restroom. Shepard can also dance with some of the lounge's other patrons.
- A dark star is a theoretical type of star that may have existed in the early universe.
- The player can ask the turian barkeep if he's heard any news, to which he'll respond, "I serve drinks" and finishes by remarking, "I don't know why humans always ask me that." This is most likely a reference to the fact that in many fictional media and works, barkeeps are often privy to insider secrets or the like useful to the player or other characters. It could also be a reference to the human bartender on the Presidum in the first game who, when asked what he had, would reply, "Information mostly."
- The player's reaction to the unnamed drink ("This is...it's green?") may be a reference to the Star Trek episode By Any Other Name in which Lt. Commander Montgomery Scott brings a drink for an alien visitor, and when asked what it is, responds "It's... uh... it's green". This line is further referenced in the Next Generation episode Relics, when Lt. Commander Data utters a similar line, this time in response to a question from Scotty.
- The background music playing in the Dark Star Lounge named "Happiness Theme" is originally from SSX 3, a snowboarding game developed by EA Sports BIG.