Or at least not turned away.  This is hard, because people normally face each other, not the camera.  Posed pictures are dead and lifeless; don't go there.  Instead, wait, wait, wait.  The opportunity will eventually present itself.  Patience.  There may be an exception when anonymous backsides highlight one person.
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Boy Scout Troop 174, Yorktown, NY.  Scouting Photography Pages at  http://troop174.info