Moba

From Slavic.info

Kindred institutions to a Zadruga in poorer circles are the Moba and Pozaymitza, primitive forms of co-operation for peasants who do not belong to Zadruga. So, for instance, a man who has not sufficient labor to plough or reap his piece of land calls for the Moba, viz., he invites all his neighbors to come and help him, say to cut corn and grass, and bring in his harvest in good time, paying nothing for such a service, providing them only with generous supplies of food and drink, but when any of them appeals to Moba, it is understood that he will take his turn. The Moba is working and singing and laughing all the day—it is a sort of socialism combined with much pleasure.