For Chambres d'Hote, I think you'll find this site a far better resource than the Routard.
http://www.gites-de-france.com/
I'd say that I've found approx 1/3 of the Ch. d'H. offer table d'hote. We just LOVE table d'hote!
I can give a personal recommendation for this one in the Dordogne/Lot:
http://www.moulindefresquet.com/