Team = Social Capital?

I played in an ultimate frisbee tournament this weekend; as usual, it was super fun and made me super tired!  But, at the end of the day, this thought popped into my mind:  Ultimate frisbee tournaments are an out-picturing of social capital (last semester, anyone?)
Within each team there is so much love and acceptance.  Teammates have to trust each other to catch, throw, follow through the continuations. We spend so much time together that we all know each other impeccably well. But there is more than just that.
Ultimate frisbee is a culture.  The jerseys, the shorts, the hats.  The attitudes.  The games that you play with the team you are playing against -- not just the game of ultimate frisbee, but during timeouts and afterwards, games are played between the teams.  Silly games, like "WA" or "kungfu" or "mini tanks".  Games that allow for laughter.   I can't think of many sports where rival teams get a long like this.
Part of the reason I love ultimate is the 'spirit of the game'.  There are no referees.  Fouls are called on a trust basis; you call a foul if you get fouled. The person that fouled you can 'contest' or 'no contest'. Honesty is a big component.
Both between teammates and between teams, there is a lot of trust and kind attitudes that are shared.  Sounds like a great kind of social capital to me!