article_snippet.sent: Scroll down for video .
article_snippet.sent: Video posted on twitter showed angry patrons attacking one another .
article_snippet.sent: The carnage spilled out into the parking lots, where police and security guards tried to calm things down.
article_snippet.sent: Ambulances could be seen outside tending to the wounded, which included guards and officers.
article_snippet.sent: NYPD sources suggested that the violence was gang-related.
highlights_snippet.sent: Video of the encounter - where patrons threw chairs - was Tweeted .
  