That was Graham Nash of the legendary Crosby, Stills and Nash yesterday lunching hurriedly on lox, cream cheese and bagel at the Booeymonger on Wisconsin Avenue. The rock group had appeared the previous night at the Merriweather Post Pavilion and Nash had to rush through lunch so he wouldn't be late for his appearance on the "Panorama" show a couple of blocks away . . .

With The Washingtonian magazine approaching its 20th anniversary in September, owners Philip and Eleanor Merrill have apparently decided to make a commitment to Washington -- they are buying an apartment at the Watergate. In the six years they have owned the magazine, they have lived in a rented home in Georgetown with their principal residence in Annapolis. Now they will own a home in both places . . .

The city's Metro system handled the Bruce Springsteen crowds with its usual smoothness and efficiency and one of those riding to the concert and back to his home in Alexandria was none other than Urban Mass Transportation Administration chief Ralph Stanley, clearly showing he's committed . . .

There are reports from Chicago, where Springsteen will perform Friday, that ticket scalpers are asking $75 a seat. The prices are said to be high because the scalpers had difficulty getting tickets. Only about 30 percent of those they paid to stand in line were actually able to buy tickets . . .

And if you think people only get excited about rock performers, up in Boston art fans are standing in line to purchase tickets to see the only American stop of a retrospective on Renoir scheduled at the Boston Museum of Fine Arts Oct. 9 through Jan. 5 . . .

Freddie Laker, whose cut-price transatlantic airlines went bankrupt in 1982, took a fourth wife yesterday on his 63rd birthday. Laker married divorce' Jacqueline Ann Harvey, 42, a public relations agent and former flight attendant with Eastern Airlines . . .

It's going to be party time at the Hotel Bristol this weekend with a Friday night cast party for the Chicago Performing Arts Festival ending its deservedly acclaimed four-play season at the Kennedy Center. Then Saturday, Jason Robards and the cast of "The Iceman Cometh" will be in to celebrate opening night. That will be a late party since the the great O'Neill classic runs nearly five hours . . .

In one of the great recent understatements, the Los Angeles Lakers' 7-foot-2 center Kareem Abdul-Jabbar said he is looking forward to more movie roles after he retires next season and feels his height won't be a hindrance. "I won't ever have the problem that Alan Ladd did -- standing on boxes, talking to his leading lady" . . .