Lorry, if you want to avoid your boss then I know a wonderful hotel in Cannes I can recommend him
If though he is the "I ought to do Le Mans before I die but want a good hotel and good wine in case I don't like it" kind of guy there is a superb hotel at Saumur on the Loire called Le Prieuré which may well have some rooms left - it did a short while back. I've arranged for a number of car clubs to stay there and it is a really good place to be - 1* Michelin restaurant, good rooms, great view across the valley and very peaceful. Go here:-
http://www.silencehotel.com/FR/hotel_hotelid-85.htmlI often take friends there for lunch when we are in the area.