What was the squabble between Frank Sinatra and Dean?

Answer 1

The final tour of Frank Sinatra, Dean Martin, and Sammy Davis Jr.--billed as 'Frank, Dean, and Sammy: Together Again--had been arranged largely as an attempt to revive Dean Martin's enthusiasm for performing following his son's tragic death. Unfortunately, Frank Sinatra and Dean Martin no longer enjoyed the close relationship they had during the 1960s. In Chicago, Sinatra did not like his hotel accomodations and insisted Dean and Sammy leave the hotel with him to seek more suitable lodging. Sammy agreed but Dean refused. The final break came after one concert, when Frank accused Dean of performing his musical set in an uninterested, lackluster manner. Dean returned to his hotel room, packed his bags, and boarded an airplane back to his home in Las Vegas, refusing to participate in the remainder of the tour. Dean was replaced in the 'Together Again' tour by former Rat Pack 'mascot' Shirley MacLaine.