If you think about it, such communities probably already exist: most families, even in capitalism, are communist internally: the parents contribute far more to the household than the children do, who tend to consume far more than they produce. From each according to their ability to each according to their need.
This likely also explains the continued popularity of communism as a political philosophy, especially among young people. Going out into the world, where there is competition and conflict is jarring, and the wish for society to be organized more like a family unit is understandable, although it is far more difficult to organize a large country in this way than a household of no more than, say, a dozen people.