We don’t do a lot of meals on the French side of the island these days but we always do our Anse Marcel days via credit card and have them charge us in EUs. It’s never been a problem and the savings is significant. By the time you rent chairs, do drinks throughout the day and then lunch........it all adds up to much more cash than we typically carry with us and particularly so when we go as a family of four plus one! Those bottles of wine on the beach can add up quickly! But OMGoodness! They do taste delicious.