I don't know of any that allow you to transfer into Le Club. Amex Membership Rewards doesn't and nor does Diners Club Rewards (or at least neither do in the UK). Airline partners are redemption only.
The places where you can earn Le Club points, besides Accor hotels, are listed here:
http://www.accorhotels.com/gb/leclub...rs/index.shtml
Limited to Club Med, Europcar, and Lenotre, it would seem.