Jees some people dont want much for free do they!
Things I can think of:
Clean and comfortable.
Info on what to do when NOT biking.
Outside area to sit and relax in comfort in the sun and shade.
No free booze, why should I pay for other people to drink? However do supply local stuff cheaper than you could pay in local supermarket + supply of cold drinks, honesty box works well.
Some where to wash bikes, fettle bikes. Personally cant see why you need workstands never ever needed one and if your going on holiday bike should be in good working condition.
Good secure bike storage (not just in the ski room) ie needs anchors for locking to in ski room. Secure areas to lock the bikes outside the chalet when just back from a ride.
I wouldnt provide tools they are likely to go walk about etc, and as above what happens when some one damages their bike using your tools? Send them to the LBS. I think its essential that you have a Local Bike Shop (maybe guests get 10% discount on repairs etc?)
Clothes washing facilities
Maps of area.
For you to think about... what will you do when people come back in covered in mud with filthy bikes? I'm sure you will not want the walking through your nice clean chalet to their bedroom to get changed? Might have to offer a couple of changing booths in the boot room where people can change and provide plastic bags for chucking dirty wet gear in?
Same reason for having secure locked areas outside the chalet you dont want dirty wet bikes in your boot room.