Hm.. We don't know what "no wave" is like because nobody asked us before. If you're sure it exists and the spelling is correct,
just add this item and we'll give you the answer.
You can also try these events:
Radio Wave Stimul Festival
(on 07.09.15 in Praha),
Backwoods Music Festival 2015
(on 04.09.15 till 06.09.15 in Stroud, ok), more...