President Reagan meets with King Hussein of Jordan. The National Restaurant Association holds its first public affairs conference, today through Wednesday at the J.W. Marriott Hotel. Phone 638-6100, ext. 247. The Coalition to Protect Black Business holds a news conference on minority business development, 10 a.m. at the Howard Inn, 2225 Georgia Ave. NW. The Washington Journalism Center sponsors a two-day conference for journalists, entitled "Politics in a Changing America: 1986 and Beyond," at the Watergate Hotel. Cost is $295; registration required. Phone 331-7977. The Commerce Department reports on August economic indicators. TUESDAY

Interpol, the International Criminal Police Organization, holds its 54th general assembly meeting today through Oct. 8 at different locations in Washington. Call Beverly Sweatman at 272-6999 for additional information. Secretary of Commerce Malcolm Baldrige and U.S. Trade Representative Clayton Yeutter discuss the president's new trade policy at a District Export Council National Conference at the Radisson Mark Plaza Hotel in Arlington. European table wine imports will be discussed at a news briefing sponsored by the American Grape Growers for Fair Trade, 2 p.m. at 701 E St. NW. WEDNESDAY

U.S. Exclusive Economic Zone programs are the topic of a National EEZ Symposium on "Exploring the New Ocean Frontier," running today through Thursday at the Baird Auditorium, National Museum of Natural History. Registration is $25. Phone (301) 443-8218. The Health Industry Manufacturers Association holds a briefing on its recommendations for improving the Food and Drug Administration's process for approving medical devices. The session will be held at 5:30 p.m. at the Capital Hilton. The Brookings Institution sponsors a program entitled "The Role of Government in the U.S. Agricultural Economy," at 9 a.m., at the institution, 1775 Massachusetts Ave. NW. Phone 797-6280. THURSDAY

The Cato Institute holds a reception marking the publication of "National Economic Planning: What Is Left?," by Don LaVoie, beginning at 4:30 p.m., at 224 Second St. SE. Phone 546-0200. Francis Hodsoll, chairman of the National Endowment for the Arts, discusses the impact of tax changes on the arts, at 9 a.m. at the National Press Club. Phone 662-7500. FRIDAY

The president travels to New Jersey for a Republican fund-raiser. The economic problems of American Indians are the subject of an 11 a.m. briefing in Room 2175 of the Rayburn House Office Building, sponsored by the Full Employment Action Council. The President's Commission on Organized Crime meets with members of the Italian Anti-Mafia Committee. The session at 1425 K St. NW will be open to the public at about 10 a.m. The Arms Control Association looks at the outcome of the third review conference of the Nuclear Nonproliferation Treaty at noon at 11 Dupont Circle. Phone 797-6450. The Bureau of Labor Statistics issues its report on September unemployment statistics.