I bought the Gold C Entertainment Book for Denver before a trip to Summit County a few years ago. I only ended up using one or two coupons but left the rest of the book with my nephew who lived out there so at least it got used.
Last year I purchased one for the Tahoe area. We only ended up using one coupon. I didn't feel like searching around for most of the places in the book. I guess if I'd picked up a local map I may have used more. With the cost of meals in a ski resort area the book could be a good deal...if you are better at using it then I.