It looked like a gathering of the Reagan "kitchen cabinet" wives yesterday at Jimmy's, the Beverly Hills "in" restaurant. Jean Smith, wife of the former attorney general, hosted a luncheon for Washington hotelier Rose Narva, the director of the Jefferson Hotel. Some of the other guests at the luncheon included Mary Jane Wick, Betsy Bloomingdale, Bonita Granville Wrather, Eva Gabor and Harriet Deutsch . . .

Health and Human Services Secretary Margaret Heckler was described as being in "excellent" condition following her hysterectomy yesterday at Columbia Hospital . . .

Alabama Gov. George Wallace says the operation he underwent last week in Colorado to alleviate pain that has plagued him since a 1972 assassination attempt has apparently worked. Doctors say it will take some time to see if the operation was a success, but they report that the 65-year-old Wallace hasn't complained of the leg pain that has bothered him for so long . . .

There's a big opportunity for someone out there to appear on stage with opera star Placido Domingo when he performs Aug. 23 at Capital Centre. A call has gone out for 10 men between the ages of 20 and 30 with dancing and acting experience to appear on stage. They will not dance or sing, but will be walk-around extras in a crowd scene. Hopefuls are to send photos and re'sume's to the Capital Centre public relations office . . .

After soap opera star and rock singer Rick Springfield performed at Constitution Hall Saturday at a benefit for Students Against Drunk Driving, he decided he needed a drink. So Dave Williams of Cellar Door Productions, who is promoting the upcoming Bruce Springsteen concert, took Springfield to the 1036 Lounge in Georgetown . . .

For a brief period yesterday morning, the blackout hit Capitol Hill and slowed the business of Congress down a bit. Sen. Paul Simon, a former newspaperman who had steadfastly refused to give up his manual typewriter, quickly pointed out to anyone who cared to listen that he undoubtedly had the only functioning machine on the Hill. Sen. Charles McC. Mathias looked around and quipped, "Boy, the budget deficit is getting more and more serious" . . .

Royal Watch: The British royals have been fairly well behaved and quiet recently, but just in case anyone forgot, Monday was the fourth wedding anniversary of Prince Charles and Princess Diana . . .