At Grelle Forelle you can turn the night into day, release all your dammed up energy and dance until the morning. You can never go wrong with a visit to the Forelle, the booking is far from mainstream and always on point. Many Viennese collectives organize their parties here, you meet a lot of people from the city and don't just end up in some touristic place. The Function One system provides the right sound, catapulting the bass directly into your legs. The club is only open on weekends, but during the week there are some cool concerts from time to time.