Simply book an overnight stay in one of the accommodations listed below,
in our holiday shop Davos Klosters or at our guest services, for every night you book, you'll receive a ski pass for the open Davos Klosters Mountains ski areas.
If you book via their guest services (or their "holiday shop") only it seems. And somehow something tells me the rates there will be higher

And Nov/Early December usually isn't great for skiing..