You might have expected sniping or potshots. But former secretary of State Henry Kissinger just ate his grilled chicken and talked; National Security Affairs Adviser Zbigniew Brzezinski had cold vegetables and listened. Everybody else at Sans Souci stopped chewing and watched.

The two intellectuals, giant egos and defense wizards had wandered over from the White House yesterday for lunch at the longtime "in" spot. Did they talk about SALT, national defense, or Kissinger's testimony before the Senate? Only their waiter knew for sure.

But one thing was certain: This was not chitchat. "If you have those two minds together," said Kissinger's bodyguard, Walt Bothe, "I don't think you could ever call it a social lunch."

As for Kissinger, he claimed afterward that the two sometime intellectual rivals were just swappping old college stories. "harrvard and Columbia," he said, referring to their respective alma maters (his is Harvard).

But Jerry Schecter, spokesman for the National Security Council, did say their positions differ. Brzezinski is a firm backer; Kissinger had reservations.

Any other lunchtime topics that probably came up? "Beautiful women," surmised Schecter.

Kissinger, who wore dark pin stripes and gold cufflinks that set off a healthy tan, said that he and Brzezinski get together for a clashing of the minds every few months or so. In between, the former Cabinet secretary stays holed up in his office at 18th and K streets. He's writing memoirs called "The White House Years."

"It's the sort of a boring title," he admitted.

And what about the current White House Years?

"I think every president goes through a period of crisis that looks like it will never end," he said. CAPTION: Picture, Henry Kissinger and Zbigniew Brezezinski; by Ellsworth Davis -- The Washington Post