Show star John Ortiz organised the get together two days after the series creators, David Milch and Michael Mann, and HBO TV executives decided to cease production following the death of a horse on Tuesday morning (13Mar12)
The tragedy marked the third time a horse has been put down at the racetrack, where the series is filmed, during shooting.
Sources tell The Hollywood Reporter that more than 60 cast members came together to say farewell over breakfast on Friday morning.
The show's big names - Dustin Hoffman, Nick Nolte and Dennis Farina - did not attend the final cast meeting.
Hoffman, who is also a producer of the show, Milch and Mann reportedly organised a 'wake' for the show on Friday evening in Hollywood.