More on New Year's Eve. The year 1984 did not have anywhere near the results George Orwell expected, so there will be a happy "Farewell Orwell" party at the new Sheraton Grand Hotel on Capitol Hill to send the fateful year into history. The party, sponsored by the Washington Empaths, is a fundraiser for the MS Society . . . And New Year's Eve will be casino night at the ballroom of McLean Gardens in a fundraiser for the Big Sisters of Metropolitan Washington. Working some of the gambling tables will be Washington Redskin George Starke and television anchor Maureen Bunyan . . .

Frederic Franklin, a former director of the National Ballet and presently choreographer-in-residence for the Cincinnati Ballet Company, has received the prestigious 1984 Laurence Olivier Award as Best Choreographer of the Year for choreographing the Dance Theatre of Harlem's production of "Giselle." The award was presented in London, where the production of "Giselle" also won for Best Dance Show of the Year . . .

That was Walter Mondale last night at Arena Stage. The Democratic presidential contender, his wife Joan and their three children attended the performance of "The Gospel at Colonus." At intermission, Mondale joined Tom Fichandler, Arena's executive director, for drinks in Fichandler's office . . . Actress Joan Collins hardly gets one marriage over with when she's out there planning the next. The 51-year-old star of "Dynasty" recently agreed to final details of a divorce settlement from her third husband when she showed up this week wearing a $116,000 diamond engagement ring from 37-year-old Swedish businessman Peter Holm. The couple will be spending the new year in Antigua. "I'm thrilled. Peter is ideal for me," she announced . . .