They show up to a room where everyone's having a meeting led by Joe.
Joe tells the guys to quit joking and settle down, or they'll all wind up in San Quentin because they weren't listening to Joe's instructions for the job.
Joe gives them all their color-name pseudonyms. He warns them not to refer to themselves or each other by their real names.
Mr. Pink doesn't like his name.
Joe doesn't care. He's tired of all the whining and bickering.