Beats and bass in a disused metro tunnel by the Danube. Flex is a dinosaur of the Vienna club scene, long synonymous with incredible music and great nights out. Dance, have a beer, and keep an eye on the venue's concert calendar.
Not as "underground" as it used to be, but Pratersauna still ranks as Vienna's top electronic club, featuring an amazing sound system in a cool venue. If you're missing Berlin nightlife the DJs here will do the trick for a quick fix.