As roads go, the one to Morocco may be only a pit stop for the shah of Iran. As movies go, it's camp.

So where else would you expect to find the "Road to Morocco" last night in Washington but at the American Film Institute, followed by a couscous and lamb feast at the Embassy of Morocco.

"Amusing," said the ambassador of the now-classic Bob Hope-Bing Crosby-Dorothy Lamour film. Ambassador Ali Bengelloun and his wife hosted a post-film party, one of a half dozen given throughout the AFI year for $500-and-up subscribers. Funds go toward AFI's program that enables student of filmmaking to pursue their studies.

But Hope and Crosby's adventures along the road proved a less commanding topic of speculation than the manding topic of speculation than the shah of Iran's. He moved yesterday from Marrakesh, where he had been living in a borrowed palace, to Rabat and into a palace called Dar es Salam . In English that means the house of peace, according to the ambassador, confiding that the shah's next stop will be the United States.

"The crown prince is a student here," Bengelloun reminded a guest, and when the question of whether the shah might be welcome was raised, pointed out that, "The Americans are good to their friends."

Morocco's embassey in Tehran, like the United States embassy, was under siege yesterday for a while. "Nobody is sure about anything -- are they Communists, are they pro-Khomeini, are they pro-shah?" Bengelloun asked. "It seems like a civil war. In Morocco we're very concerned and hope that it (Iran) isn't like another Afghanistan."

The Bengellouns welcomed more than 100 guests to their Cleveland Park residence where buffet tables were set up at opposite ends of the house. Among the guests were Washington attorney Stanley Pottinger and Gloria Steinem. "I guess you'd say we're a re-item," said Pottinger. Sharing their table were Liz Stevens, there without George, and Ina Ginsburg. After dinner Alex Marciack's sound system took over to turn the embassy into a private disco.