HOUSTON, JULY 10 -- President Bush junked his prepared toast tonight and winged his remarks at his windup dinner for economic summit leaders.

"There is no work here tonight, no communiques, no amendments, no language to be corrected. We simply want you to have a very good time at the museum we're very proudful of," he told his 110 guests at the Museum of Fine Arts.

"I would say to my summit partners, when you drive down the streets and see people waving, they are speaking from the heart, so make yourselves at home," the president said. "We're glad you're with us."

With that he sat down.

The remarks the White House distributed to the news media an hour earlier were considerably longer and gave a retrospective of the year since the leaders last met in Paris, a year in which totalitarian governments toppled.

Social Secretary Laurie Firestone said, "That's it, goodbye everybody," dismissing the press standing at the entrance of the Grand Hall of the George Brown Pavilion.

Perhaps a tip-off that something wasn't going right was given by Chief of Protocol Joseph Reed, who walked past with a pained expression and, when asked by a reporter what was wrong, shrugged his shoulders, looked skyward and kept walking.

White House aides seemed perplexed if not astonished by the president's unexpected deviation from the prepared speech.

"Everybody's baffled," one aide said. "I think only one person knows the answer -- the president."

"We'll find out," said another, "but if he didn't {give the prepared remarks}, that's it. We have waiters in the room, which means he's not going to stand up again."

And indeed once Bush was back at his table, with British Prime Minister Margaret Thatcher on his right and French First Lady Danielle Mitterrand on his left, dinner was served.

As it turned out, the president didn't give his speech because of a "staff mix-up": No one remembered to bring his text to the museum.

The atmosphere for the whole evening was as informal as Bush's remarks.

The eight summit leaders had gotten along so well the night before that they had lingered on for individual tours of the art and furnishings collection at the Bayou Bend mansion, where they had dined. Peter Marzio, director of the Museum of Fine Arts, expressed admiration for Thatcher, who, he said, "knows the decorative arts like you wouldn't believe."

Tonight, the leaders and their spouses, who had arrived in reverse order of protocol to be greeted by Bush and First Lady Barbara Bush, joined Texas Gov. Bill Clements, Houston Mayor Kathy Whitmire and other city notables in a happy crowd that milled around like old friends at a country club.

They dined at a dozen tables of 10, attended by five White House butlers flown here for the occasion. Additional waiters were hired for the event and underwent a rigorous six-hour rehearsal session on Sunday. The tables had white cloths with raspberry-colored overlays and were set with Tiffany's Manhattan china pattern. The settings were borrowed and will be sold by Tiffany's for $155 each. There's already a waiting list of potential customers.

The menu featured chilled yellow tomato soup with avocado relish, hickory grilled veal loin medallions with morel sauce, sweet corn pudding, cobbler of Cherokee blackberries and Texas peaches with sweetened cream. The dishes, spiced with Southwestern flavors of chili and cilantro, were accompanied by three wines, including a 1987 Llano Estacado Chardonnay from a Lubbock, Tex., vintner.

If it was a hot night outside it was hotter inside, with the evening's principal, Barbara Bush, and three of her guests, Marilyn Quayle, Nancy Sununu and Georgette Mosbacher, wearing hot pink. Mosbacher said, "We should have all called each other, but we're all in the pink tonight."

Also in hot pink -- cummerbund and shoes -- was Marilyn McCoo. Singer McCoo was one of several who performed for the dinner guests plus an additional 80 people invited to the after-dinner show in the Wiess Gallery, where a stage had been set with a backdrop tableau of the Houston skyline.

It was the end of a long evening, in the course of which Secretary of State James Baker III, Treasury Secretary Nicholas Brady and France's President Francois Mitterrand all appeared to be dozing at times.

"I know our summit partners are all dead tired, coming across a zillion time zones," Bush said, but he went on to explain his reasons for the variety of entertainers: juggler Michael Davis, opera singer Frederica Von Stade, actress Cicely Tyson, country singer Ricky Skaggs and McCoo.

Of the country music that has played such a prominent role in lighter moments throughout this summit, he said, "It's the beat, but also the lyrics," and urged his guests to pay particular attention to them.

Comic juggler Davis, who said he has performed at five other presidential events, so cracked up the Bushes that several times Barbara Bush bent forward, touching her head to her knees in convulsive laughter. They roared with laughter at Davis's impersonation of former president Richard Nixon. Davis stuffed ping-pong balls in both sides of his mouth and held up his arms in a victory sign.

Country singer Skaggs called his singer wife, Sharon White, up on the stage to join his act. Afterward he said, "Sharon was afraid she'd be the only person here in cowboy boots." Looking at President Bush, he added, "But she's in good company."

The guest list for last night's dinner:

James Baker, secretary of state, and Susan Baker

Nicholas Brady, secretary of the treasury, and Katherine Brady

Bill Clements, governor of Texas, and Rita Clements

William Harris, president, Texas Southern University, and Wanda Harris

Carla Hills, U.S. trade representative, and Roderick M. Hills

Kenneth L. Lay, co-chairman, 1990 economic summit, and Linda Lay

Jon Lindsay, judge, and Tony Lindsay, judge, Houston

Frederic V. Malek, U.S. ambassador to the 1990 economic summit, and Marlene Malek

Peter C. Marzio, director, Museum of Fine Arts, Houston, and Frances Marzio

Robert Mosbacher, secretary of commerce, and Georgette Mosbacher

Joseph V. Reed, chief of protocol

George Rupp, president, Rice University, and Nancy Rupp

Alexander Schilt, chancellor, University of Houston System

Brent Scowcroft, assistant to the president for national security affairs

George W. Strake Jr., co-chairman, 1990 economic summit, and Annette Strake

John H. Sununu, chief of staff to the president, and Nancy Sununu

Richard Wainerdi, Texas Medical Center, and Angela Wainerdi

Kathryn Whitmire, mayor of Houston

Clayton Yeutter, secretary of agriculture, and Jeanne Yeutter

Francois Mitterrand, president of France, and Danielle Mitterrand

Roland Dumas, French minister of foreign affairs, and Anne-Marie Dumas

Pierre Beregovoy, French minister of economy, finance and budget

Jacques Andreani, ambassador of France, and Donatalle Andreani

Hubert Vedrine, spokesman, office of the French president

Elisabeth Guigou, counselor to the French president

Loic Hennekinns, diplomatic counselor to the French president

Anne Lauverceon, senior staff member, office of the French president

Margaret Thatcher, prime minister of Great Britain

Douglas Hurd, British secretary of state for foreign and commonwealth affairs, and Judy Hurd

John Major, British chancellor of the exchequer, and Norma Major

Sir Antony Acland, ambassador of Great Britain, and Jennifer Acland

John Garner, British consul general, and Mrs. Garner

Charles Powell, private secretary to the British prime minister

Helmut Kohl, chancellor of West Germany, and Hannelore Kohl

Hans-Dietrick Genscher, West German minister of foreign affairs, and Barbara Genscher

Theodor Waigel, West German minister of finance

Helmut Haussmann, West German minister of economics, and Margot Haussman

Horst Kohler, West German secretary of state, federal ministry of finance and personal representative to the chancellor

Hans Klein, West German federal minister for press and information, government spokesman

Horst Teltschik, director-general, West German chancellery

Walter Neuer, director, head of the West German chancellor's office

Brian Mulroney, prime minister of Canada, and Mila Mulroney

Joe Clark, Canadian secretary of state for external affairs

Michael Wilson, Canadian minister of finance, and Margaret Wilson

Derek Hudson Burey, ambassador of Canada

Stanley Herbert Hartt, Canadian chief of staff of the prime minister

de Montigny Marchand, Canadian undersecretary of state for external affairs

Luc Lavoie, director, tour and special events, Canadian prime minister's office

Richard Arthur Morgan, executive assistant to the Canadian prime minister

Bonnie Margaret Brownlee, executive assistant to Mrs. Mulroney

Giulio Andreotti, prime minister of Italy, and Livia Andreotti

Gianni de Michelis, Italian minister of foreign affairs

Guido Carli, Italian minister of the treasury

Umberto Vattani, personal representative of the president of the council of ministers of Italy

Rinaldo Petrignani, ambassador of Italy

Raniero Vanni d'Archirafi, general director for economic affairs, Italian ministry of foreign affairs

Enzo Perlot, general director for political affairs, Italian ministry of foreign affairs

Mario Sarcinelli, general director of the treasury, Italian ministry of the treasury

Toshiki Kaifu, prime minister of Japan, and Sachiyo Kaifu

Taro Nakayama, minister of foreign affairs of Japan, and Hanako Nakayama

Ryutaro Hashimoto, minister of finance of Japan, and Kumiko Hashimoto

Kabun Muto, minister of international trade and industry of Japan, and Hisako Muto

Ryohei Murata, ambassador of Japan, and Reiko Murata

Koukou Sato, member of the Japanese Diet

Hisashi Owada, Japanese deputy minister of foreign affairs

Jacques Delors, president of the commission of the European Communites

Frans Andriessen, vice president for external relations of the commission of the European Communities, and Catharine Andriessen

Henning Christophersen, vice president for the economic and financial affairs for the commission of the European Communities, and Jydte Christophersen

Andreas van Agt, ambassador of the commission of the European Communities

Laurens Jan Brinkhorst, director-general, directorate general for the environment

Hans Wijnmaalen, head of cabinet to Vice President Andriessen

Jan Schmidt, deputy head of cabinet to Vice President Christophersen