Brought Amex travellers cheques in Euros on our trip to France only to discover NO ONE, not even banks take or cash them. Have tried paying with them in hotels, restaurants, and stores-no takers. Exchange bureaus (even Ria which is recommended on American Express website in Lyon) would not cash them. Spent a good couple hours wandering and visiting the following to no avail: La Poste (used to cash, but not any more), BNP Paribas, LCL, Societe Generale, Credit Agricole, Bank Populaire, CE.
Take note: don't bother with travellers cheques-will never use again. BRING a debit card, credit card with chip/pin technology, and some cash.