Two violinists, whose combined years of playing in the National Symphony Orchestra total 86, will retire today after playing the fourth and last performance of the orchestra's opening program.

Milton Schwartz and Herbert Sokolove played in the NSO's opening concert on Nov. 2, 1931, under the baton of the orchestra's founder and first music director, Hans Kindler. Schwartz, who left the orchestra from 1945 to 1953 to serve as concertmaster of the Capitol Theater Orchestra, accumulated a total of 42 years with the symphony. Sokolove moved to the Navy Band for six years from 1939 to 1945 and has a total of 44 National Symphony seasons.

Staying power: Lena Horne, whose one-woman show is the toast of Broadway, has decided to extend her stay at the Nederlander Theater past its scheduled Jan. 5 close. Her new projected closing date: June, when she celebrates her 65th birthday . . .

Tennis pro John McEnroe may soon move his much-noted theatrics off the court and onto a movie screen near you. McEnroe has been approached by producers Steve Leber and David Krebs, who were responsible for "Beatlemania," to play the carrot-topped lead in their projected film version of the comic strip "Archie," which is, you recall, about obnoxious teen-agers in the '50s . . .

You loved the album, now see the movie: Joining the ranks of concept albums being adapted for the movies is Pink Floyd's 1980 best seller "The Wall." Bob Geldorf, lead singer for Ireland's New-Wavish Boomtown Rats, has been signed for the lead, which will be directed by Alan Parker of "Midnight Express" and "Fame" fame . . .