As of now there is none despite bitcoin being legalized in our country or is it ? i really dont know if it's accepted or not cause recently the government made some rules and regulations in using it. So i thought i can use it as payment for other businesses such as for example you have said supermarket but it seems there no store that is currently accepting bitcoin in my country.
so far we have not heard anything about supermarkets that accept bitcoin payment methods, no one has dared to speculate doing anything related to supermarkets that accept bitcoin, but it seems if this is backed up and adopted into real I think there will be many bitcoin users who transact there
it will really be a bit hard before we can start seeing some supermarkets making use of bitcoin as payment method. Some are not well informed and some are scared of its volatility whereas there are services that can automatically convert it to fiat if that is what they want.
The thing is, having stuffs like this will create more awareness and will make the importance and value of bitcoin to really be exploited.