The best stargazing this summer won’t be in Beverly Hills or Malibu but at the Uptown Theater on Connecticut Avenue in Washington, D.C., just 10 minutes from the White House. One of the most hotly anticipated films of the year, Jurassic Park, premieres there this week as a benefit for two children’s charities. And the glitterati expected to attend include the movie’s director, Steven Spielberg; its stars, Jeff Goldblum and Laura Dern; plus Whoopi Goldberg, – Martin Scorsese, Spike Lee, and moguls Gary David Goldberg, Sid Sheinberg, and David Geffen. Dozens more Hollywoodites are likely to be on hand. Since First Lady Hillary Rodham Clinton champions children’s charities, and since Hillary and Bill Clinton both love Hollywood, it’s a sure thing that they’ll be there, right? Not so fast. Washington’s affair with Hollywood, which began as a coy flirtation at the Democratic Convention last summer and burst into passionate flame when Clinton won the presidency, has become a disaster almost overnight. Both partners are, as they say, having second thoughts-especially about the wisdom of being seen together in public. When it comes to who loves whom in our political and entertainment capitals, all bets, suddenly, are off. The new perception: The administration is so busy swooning over celebs that it has lost its senses. The White House seems to be paying some heed. Last week it removed its most visible pro-Hollywood symbol-flop-haired pretty boy George Stephanopoulos, who has been dating actress Jennifer Grey (Dirty Dancing)-from his role as White House communications director. True, his replacement, former MacNeil/Lehrer NewsHour regular David Gergen, is a small- screen star, but the ex-Reaganite isn’t likely to be squiring actresses around town any time soon. If the D.C.-L.A. dalliance really is over, it will be one of the shortest torrid romances on record. Hollywood liberals raised millions of dollars for Clinton’s campaign and flew like moths to the capital, starting with his inauguration. A partial list of Hollywood’s kibitzers on the Potomac: *Barbra Streisand and Judy Collins slept over at the White House; Liza Minnelli reportedly has also been invited. *Billy Crystal and Sam Waterston dined in the White House mess. *Michael Douglas, Richard Dreyfuss, and others upstaged the pols at the White House Correspondents’ Association dinner May 1. *Sarah Jessica Parker, Markie Post, Goldie Hawn, Warren Beatty, Annette Bening, and a host of others have also made pilgrimages. *The President dined with screen temptress Sharon Stone at a Lincoln Center fund-raising dinner on May 12. But once Clinton started to fumble as head of state, his infatuation with Hollywood abruptly seemed unfitting. Streisand, whose performance at a party last fall helped raised $1.1 million for Clinton’s campaign, was singled out for the worst scorn after her gabfest with Chairman of the Joint Chiefs of Staff Colin L. Powell and her meal with Attorney General Janet Reno (see poll on page 25).