A kibbutz is an Israeli concept of a farm-residence. The basic principle is that anyone can come in, stay and be fed, as long as they work towards the upkeep of the kibbutz. One can stay for two days or for a lifetime. There are 278 kibbutzim (plural of kibbutz) in Israel. They are often strictly Orthodox Jewish - requiring no work to be done on Shabbat
, for example. They are the basic Communist template, because often no money is exchanged in the residence/farming transactions.