Let's meet at Kennedy's for a drink and a catch-up, and then wander over to the exhibition around 17:00 to see experimental game demos, talks by invited speakers, and a "Worst Gamification" award ceremony.
There's stuff happening there for the rest of the evening, so you can stay as long as you like.
Full details here: http://www.gamezfestival.ch/
Disclaimer: I'm not sure what language all the talks will be in. Some may be in German, though I hope not too many because my German isn't very good.
If you're coming later and we're not at Kennedy's anymore, please head directly to the exhibition at Kunstraum Walcheturm, Kanonengasse 20.