As the name implies, the decor is dark and confined. Couches arranged around low tables offer intimate seating, while social-minded diners may choose to sit at the tall tables and chairs located in the center of the room. On the menu are entrees such as chicken burritos, pasta, Mediterranean salads and fish and chips. Also good are the huge pizzas. The Underground's happy hour specials and extensive menu have contributed to its status as one of Saigon's most popular nightspots.