For some interesting background reading, here's a quick summary of what the Potlatch tradition is.
Basically it's sharing. Sharing in a socially cohesive form. It's really saddening to see how it was suppressed historically, essentially as a form of genocide. But elements of it exist here in Ur and it's a form of play we could encourage.
When Group Halls become a reality, Potlatch could be very viable for communities that form around them.