In some countries such as Japan it's almost unheard of for a fast food chain or convenience store to accept credit cards.
In others like Australia all convenience stores will and some fast food chains at least, but there will probably be a minimum purchase of $10.
In some countries including some in Eastern Europe many or most of these and petrol stations will accept cards for even small amounts.
So which is Bulgaria? (I have no lev left, it's night, I'm hungry)
I know all the alternatives such as changing money and using an ATM but for this question I want to focus on just the problem asked please.)