In our part of the world, Crypto currency is mainly accepted in internet based services like premium content and such. But offline, i haven't heard of any in our neighborhood. I heard that it is bustling in Thailand to attract more tourists in, but they accept top and main coins and not crao coins.
An offline store is like the type of place where people do not have access to the internet and as a result to the crypto service. So I do not think that it is possible to use the crypto in an offline store as long as you do not have the internet services.