Let me share some of my experiences with my fellow travelers. The big supermarket "Casino" near the hotel does not accept cash on Sundays, they accept only their own "blue card", as they put it. So, don't go there on Sunday. The rest of the week is OK. On Sunday, when you exit the hotel, turn left and take the opposite direction of the "Casino" supermarket. Go under the railway bridge, continue straight and on the rue Charles de Gaulles, on the right side, you'll find the small supermarket, which is open every day except Tuesday until 9 pm. They accept cash on Sunday. Unfortunately, the hotel staff did not instruct me about all that and so, I had to learn it by myself. As for the rest, the hotel was pretty much OK.