Flex is a music club located by the Danube Canal in Vienna, having been established in 1990 and later relocated to a former subway tunnel in 1995. The venue is known for its sound system and hosts a diverse range of music genres, such as rock, techno, dub, and drum'n'bass. It features a main hall with a stage and dance floor, alongside the Flex Café, which offers a separate bar and dance floor for DJ sets and smaller events.
