said by CylonRed:
In my travels - I found tourist areas would gladly take them and very few of the restaurants refused them - maybe on place in Baltimore. In general - I have had very few placers that sis not take AmEx. Even when I drove cross country to Idaho from Ohio.
Well Key West is certainly a prime tourist area, and believe me there are many bars and restaurants, and some stores that will not take AMEX, because of its high fee to merchant cost.
Used to be that way with Discover too (to fund their cash back)... but they seemed to have worked things out (and also lowered but for special promotions their cash back too)... most places that still don't take AMEX do take Discover now.--