ClassiX Halloween Madness Back to the roots. Back to the Classics. ClassiX brings the legendary sounds of House and Techno back to Vienna's dancefloors for a special Halloween edition. Taking place at M1, formerly known as the iconic Atrium, the event celebrates the spirit of Vienna's 90s and 2000s club culture with unforgettable tracks, timeless anthems and the energy of the original rave generation. Expect a night of House and Techno Classics across multiple floors, featuring DJ Observer and a lineup dedicated to the sounds that shaped an era. The venue offers approximately 800 m² of club space, including the Main Floor, Kantine Floor, lounge and VIP areas. Halloween Specials: Professional Halloween makeup and styling corner Shot specials Food available throughout the night VIP tables and packages Saturday, 31 October 2026 M1 Vienna (formerly Atrium) House Classics. Techno Classics. Rave Memories. See you on the dancefloor!