Malcolm Forbes,one of the few wealthy men in America who has fun with his money, will be back in Washington next week for his almost annual yacht party down the Potomac. This year Forbes is showing off his new Highlander yacht with helicopter, conceived three years ago and launched last October. Forbes says his April 2 party will be the first social function on the yacht. Guests expected for the glittery evening include Supreme Court Chief Justice Warren Burger; CIA Director William Casey; former White House deputy chief of staff Michael Deaver; AFL-CIO President Lane Kirkland; television newsmen Ted Koppel, Jim Lehrer and Roger Mudd; Secretary of State George Shultz; Democratic Party powerbroker Robert Strauss; national security affairs adviser Vice Adm. John Poindexter; and the even wealthier H. Ross Perot . . .

It would have been fun to listen in on the conversation at this table yesterday at lunch. There were four former top aides to First Lady Nancy Reagan at the White House having a get-together at Duke Zeibert's. It was Sheila Tate, former press secretary; Gahl Hodges, former social secretary, now wife of the ambassador to West Germany, Richard Burt; Ann Wrobleski, former projects director; and Joe Canzeri, former deputy to Mike Deaver . . .

There will be a reception at the National Press Club tonight for Yoichi Funabashi, the Washington economics correspondent for Asahi Shimbun, a leading Japanese newspaper. Funabashi recently received the Vaughn-Uyeda Prize for his series of articles on the United States and international affairs. The award, founded 40 years ago by United Press International and the Japanese Newspaper Association, is known as the "Japanese Pulitzer" and regarded as the most prestigious journalism award in Japan . . .

Yoko Ono's concert visit to Washington scheduled for April 7 at the Warner Theatre has been canceled. A spokesman for the William Morris Agency said Ono returned from her European tour last weekend and decided "the structure of the whole show was really not applicable to the American public" . . .

Royal Watch: On that other upcoming wedding across the Atlantic. There are some family problems. While all those social pretenders are wondering about their invitation to the July 23 marriage of Prince Andrew and Sarah Ferguson, the dark question being raised is: Will her Argentine stepfather, professional polo player Hector Barrantes, be invited? Sarah's mother left her husband, Maj. Ronald Ferguson, for Barrantes 11 years ago. During the 1982 unpleasantness when British forces wrested the Falkland Islands from Argentine invaders, Prince Andrew was involved as a helicopter pilot. Barrantes has sharply denied press allegations that he voluntered to fight on the Argentine side. Since Buckingham Palace won't release the guest list until shortly before the wedding, the world will have to wait and see if Barrantes' invitation is in the mail . . .

After all these years: A leading Romanian writer, Adrian Paunescu, has criticized a recent British television production of "Dracula" as "an attempt to destabilize our country." He wrote that "the film on Dracula, like all writing about him in Western Europe, is just political pornography dreamed up by the enemies of Romania." And all that time we thought Dracula was just a sexy guy with a peculiar taste in liquid refreshments . . .