A Grenada night, featuring a slide presentation...

A Grenada night, featuring a slide presentation and lecture on the island, will be held by the Foundation for Field Research on Sept. 13 from 7 p.m. to 9:30 p.m. at the Garden Court Hotel, 520 Cowper, Palo Alto. Cost is $17 at the door or $15 advance registration. For additional information, contact the foundation at 787 S. Grade Road, Alpine, Calif. 92001-0380, telephone (619) 445-9264.

The Department of State extended its travel advisory on Panama an additional 30 days due to unsettled conditions in that country. For up-to-date information, call the U.S. Embassy in Panama City at (507) 27-17-77.

Continental Airlines will begin daily transcontinental nonstop service from three California cities--San Jose, Ontario and San Diego--to its hub at Newark, N.J., on Oct. 15, with MaxSaver fares $147 one way. Continental also will start twice-daily, nonstop service between San Jose and Houston on Sept. 9, along with four additional daily flights between Los Angeles and San Jose. MaxSaver fares between Houston and San Jose will be $122 one way.

A four-series course on the travel industry will be conducted by Learning Tree University beginning Sept. 14 on the Chatsworth campus, 20920 Knapp St., Chatsworth, Calif. 91311. Cost of the classes ranges from $75 to $110. For additional information, call (818) 882-5599, Ext. 500.

MGM Grand Air, a new airline aiming at the executive business market, will fly twice a day to New York City from Imperial Terminal at Los Angeles International Airport morning and evening beginning Sept. 8. For additional information, call (213) 640-2700.

A travel writing seminar will be held by Joan Follendore from 10 a.m. to 4:30 p.m. on Sept. 26 at the Real School, Long Beach. Cost is $39 for the day. For additional information, call Follendore at (213) 988-0118.

Alaska Airlines will increase its fall schedule of round-trip flights between Southern California and the Bay Area from six to 23 on Oct. 1. For reservations or additional information, call any travel agent or Alaska Airlines (213) 628-2100.

A seminar on France’s cuisine, language and culture will be conducted in French by International Friendship Service on the first weekend of each month beginning in October from Friday to Sunday evenings at the Ritz Carlton Hotel, Laguna Niguel, and at the Meridien Hotel, Newport Beach. Cost is $290, which includes eight hours of class, lodging, meals and other activities. For additional information, call International Friendship Service at (714) 458-8868.

Skiers can fly nonstop into Aspen, Colo., from Los Angeles and Long Beach beginning Dec. 17 through March 28, 1988 on Aspen Airways, now operating as United Express. The flights, which are listed in the airline computerized reservation system, can be booked by calling United Airlines at (800) 241-6522.

Varig Brazilian Airlines is offering direct flights from Los Angeles to Rio de Janeiro on Saturday and Wednesday afternoons, in addition to Tuesday, Friday and Sunday afternoon departures. For additional reservations, contact travel agents or call Varig at (800)-GO-VARIG.