While we are using this thread to plug other clubs (i volunteer for both of them, call it "vested interest", no money is made by anyone from this):

ZHIC / Zurich International Club (www.zhic.org), sends out a weekly newsletter with activities in and around Zurich. Target audience are professionals in their 30's to 40's. Normally no children activities, unless someone volunteers to take that on. Subscribing to the newsletter is free of charge.

ISCZ / International Ski Club of Zurich (www.iscz.ch), a ski / snowboard and social club, also targeting people in and around Zurich. Membership is 20 CHF. Membership plus 4 subsidized ski lessons and subsidized ski tickets, is 230 CHF. Many social events are also subsidized (dinners, ski weekend, etc). Ski/Snowboard level from absolute beginner to suicide off-piste cliff jumping. Subscribing to their mailing list is free of charge.