So, Mike, this is listed wrong in the Gigography. It should be "Heineken Green Room" at "Hafen Freudenau". See flyers below.
I found this crazy video showing the stage arriving on a boat floating down the Danube River. UW is listed as the first act that night, so as Ninja Power related, it seems they are they ones playing as the boat arrives.
https://imgur.com/a/zi5tEcV
