Actually, the working sessions and panels are better attended than any conference I've ever seen.
But there are also officially sanctioned "leisure activities"—and we're not just talking about the late-night parties. Here are a few of my faves from the official guidebook (and I swear I'm not kidding):
Cheese Fondue Cooking Course: "Learn how to make Switzerland's favourite cheese specialty under the expert guidance of the 'cheese master'." (A cheese master, I suppose, cuts the cheese?)
Audi Safe Driving Course: "Under the supervision of experienced instructors, in Audi cars, learn to master critical situations such as braking, hazard avoidance, overtaking, braking on a corner or skid correction," (This course is apparently in high demand. I would love to see who takes it!)
Avalanche Research: an "entertaining" tour of the Swiss Federal Institute of Snow and Avalanche Research. (You say "avalanche", I think "entertaining"!)