K4 is the iconic underground nightlife destination of Ljubljana that has produced some of the pioneers of Slovene electronic music. However, in recent years the club had started to lose its edge (and visitors) and was in need of a reset. Joining forces with local graffiti artists, we emblazoned the interior with fluorescent glow in the dark tags. Every wall from the toilets to the dance floor is an illuminated head trip.

We then took the campaign to the streets, with a series of posters designed by over 20 Slovenian artists, illustrators and designers to let the word be heard. Our intervention succeeded in bringing back the old underground vibe and 20% more visitors compared to the previous two years.