Venue Detail
Klub K4 / K4 Roza
About this venue
K4 is a mixed underground electronic club, but recurring K4 Roza nights bring a distinctly queer charge to the basement. When Roza takes over, the bass drops, the wardrobe opens, and the dance floor becomes considerably more fluent. Vibe: Intimate, raw, and high-energy. The venue splits into two rooms: a main floor with a crisp sound system and minimalist lighting for heavy techno and house, and a smaller back room perfect for experimental beats, drum & bass, and breaks. It gets hot, sweaty, and beautifully dark.
Practical details
Address: Kersnikova ulica 4, 1000 Ljubljana, Slovenia
Hours: Event-led, commonly around 23:00-05:00; check the official programme.
Canonical: https://www.queeratlas.app/ljubljana/venues/klub-k4-k4-roza--1519
Venue intelligence
Know before you go
Typical queue
Generally very fast and chill. You can expect a 5 to 20-minute wait at the door, peaking around midnight to 1:00 AM.
Best night
Friday night, which is traditionally reserved for their most cutting-edge underground selectors and dedicated queer/alternative student nights.
Locals vs visitors
A loyal, tight-knit community of local artsy students, underground electronic music purists, and Ljubljana's progressive LGBTQ+ crowd. It feels incredibly welcoming and entirely free of mainstream pretense.
Dress code in practice
Completely casual, expressive, and comfort-focused. You will see plenty of oversized streetwear, vintage sportswear, thrifted finds, and dark raver gear. There is no snobby door selection based on your clothes—just don't show up in upscale, rigid office wear or a fancy suit.
Staff inclusion
Exceptional. As a historic pillar of the city's alternative and activist scene, the venue is deeply committed to safety and inclusivity. The door staff and bartenders are friendly, progressive, and highly protective of queer, trans, and non-binary patrons.
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