Do the Kroger's have the Verifone MX915 (black shiny and comes with Contactless on by default) or the MX870( grey old ones). So I asked Kroger about Apple Pay and they said they were evaluating Contactless payments still and they said a few of their stores do accept them. I'm sure they will feel the pressure at some point and choose to turn it on, especially since most Kroger's already have MX915 terminals. To find what what places accept Apple Pay use this site: http://www.mastercard.us/cardholder-services/paypass-locator.html is helpful or you can use the MC nearby app on your phone which ties to that same online Paypass database. There is also this MR thread: https://forums.macrumors.com/threads/1806254/ I bet there are many ma and pa places to use it as well, which is fun to find and use it there. For example, I see that a The Fresh Market in Houston is on the Paypass locator, 5016 San Felipe ST Houston, TX 77056.
I think a lot of stores that say at a corporate level that they're testing ApplePay hadn't actually communicated that most of the employees. Most places I go no one has even heard of ApplePay.