A chip-and-signature card, as recommended, would cause major confusion in Europe, especially if you don't speak the language and the clerk doesn't speak English. You don't normally need to convey "no chip, please swipe", since the absence of a chip is visible, but even if you do need to, it's a lot easier than "no PIN, please swipe".
My money-saving travel tip for Americans is: take your prescriptions with you. Most European pharmacies will /a/ honour US prescriptions and /b/ tell you in advance what it will cost to get them filled. Even without the prescription, it may be worth blowing $30 on a doctor's visit (that's what you pay in France) given the subsequent savings on meds.