B018 is Beirut's most famous and most architecturally singular nightclub. Set into the concrete of a former industrial wasteland in Karantina, you enter through a steel hatch and descend into a low-ceilinged bunker with coffin-shaped seats, a mirrored ceiling, and a wraparound bar.
Music runs late and loud — electronic for the most part, with house, techno, and the occasional live set. The roof opens after midnight to reveal the city's skyline above the dance floor. It is not for the easily intimidated, but it is one of the great clubbing experiences in the region. Dress reasonably and arrive after 1 AM.