I have not been there, but from the stories I was told in the years after this, the venue is Provitreff (http://provitreff.ch). Organized by the people of Speed Airplay radioshow.
Banner image from Keep Your Eyes Open by Glen E. Friedman
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Hey, I was there - got photos of the show too. I'm also pretty sure a guy in the crowd was filming the show, but no idea if it was every released in any form. FVGAZI was totally new to me at that point, but the members' previous bands was definitely a drawing factor for the attendees that night, including me.
Provitreff was a nice venue, saw some great bands play there during the 2 years I lived in Switzerland.