Luda kuća (Mad house) is the private theatre and cabaret of actors Rene Bitorajec and Branko Đurić Đuro. The artists’ main requirement was for the hall to be polyvalent, i.e. for the seating arrangement to be adjustable for various kinds of performances. ČERNELIĆ Interior Solutions achieved this by using a special system of theatre chairs that aren’t fixed to the floor ­permanently, but can be removed, leaving the floor free for other uses.