Small parts of the Cuban economy and the DPRK economy operate under markets, especially so since the fall of the soviet Union. This part is much larger in Cuba since the sanctions.

If you ask an Ultra, even the smallest exchange of goods or services not conducted under the barter system is an infraction on socialist ideals and therefore makes you a capitalist.

The kid selling lemonade at a lemonade stand in their frontyard is bourgeoisie.