Boui Boui Bilk is a great place for happenings like bazars or fleamarkets where you can find some treasures for small money and meet many interesting people...having a drink...or two...and some funny conversations. This is really a place where not many tourists go and where you meet the real locals and creative, young and outgoing people...
You should visit if you are interested in the young and creative (maybe also a little bit alternative) scene of Düsseldorf and if you like such things as vintage markets with some food trucks and drinks...
When you visit the homepage of the place you can always find out what's going on. There are always many different events in Boui Boui Bilk!