Big Lots accepts Android Pay also that makes it easier. Also some banks don't support Samsung Pay but support Android Pay. At Big Lots you have to tell the cashier you are paying with a card so they will activate the pin pad for payment.
Looks like you and I live in the same place well I live in Cape Coral but I never can get my S6 to work at the Walmart Neighborhood Market but the last time I was at the normal Walmart it worked. I am gonna try it asap again. I heard from another poster they said BY THE STORE that S-pay is not allowed or will not work. I think same with Apple pay and Android pay. I MIGHT try that for the heck of it.
I think the shape of the machine at the Walmart Neighborhood Market will not let it work that is my thinking.