Dance events loom at every turn as the weekend approaches, beginning with today's scheduled appearance by New York City Ballet choregraher George Balanchine as luncheon guest at the National Press Club.

The density of dance activity is caused in part by the slew of repertory programs by the New York City Ballet itself, which continues through Sunday evening at the Kennedy Center. Meanwhile, some New York City Ballet dancers have been enriching the local scene in other ways.

Frank Ohman, for instance, created a ballet called "Trio Graciosa" for Gloria Isaken's Potomac Ballet Company, and it will be performed by the troupe tonight in a special showing at 8:30 p.m. at Eleanor Roosevelt High School, 7601 Hanovor Pkwy., Greenbelt, Md. Ohaman himslf will dance in performance of his work.

Robert Maiorano, another New York City Ballet dancer, has done a similar turn for the Fairfax Ballet directed by Thomas and Illona Russell. His new "Brahms Hungarian Dances" will be presented by the company in school performances throughout March and April, and publicly at 3 p.m. May 28 and 29 at Fairfax High School.

In addition to the New York City Ballet performances, other area dance events this weekend include:

The Louis Johnson Dance Theater presented by the Howard University Drama Department in three performances at 8 p.m. in the Ira Aldridge Theater on the Howard campus, Friday, Saturday and Sunday. Johnson, well-known stage and screen choreographer whose most recent credit is the coming movie version of "The Wiz," currently heads the Howard dance program. For further information, call 636-7700.

The Paul Taylor Dance Company, returning to Lisner Auditorium for perfomances Friday and Saturday evenings at 8 p.m. The program will include the Washington premiere of Taylor's "Images," created in 1976 to the music of Debussy. Also to be seen are "Polaris,," which received its metropolitan debut at Lisner last fall, and "Public Domain."

"Dances for March," at the Dance Project, 2424 18th st. NW. (entrance in rear), will feature works choreographed by four Washington-trained dancers, Jill Becker, Elly Canterbury, Susan Sachs, and Cynthia Schraf-Fletcher. Performances are Friday and Saturday at 8:30 p.m. For information, call 462-1321.

Maryland Dance Theater, the statewide touring company, will present a varied program Friday and Saturday evenings at 8 p.m. in the University of Maryland's Tawes Theater. A reception following the Saturday performance will honor Prof6. Dorothy Madden, one of the prime movers of area dance, who is retiring from the university's dance faculty after 29 years of service.Prof. Madden founded both the dance department at the University of Maryland, and the Maryland Dance Theater.

Twelve dance companies of Fairfax, Va., will be featured in the county's first annual Dance Showcase, to be presented Sunday afternoon at 2 p.m. at W.T. Woodson High School. Ballet, Jazz, tap, square and folk dancing will be represented. For information, call 941-6066 or 691-2671.

Mime Craig Babcock will present a family-oriented performance Sunday afternoon at 2 p.m. in the Kreeger Auditorium of the Jewish Community Center, 6125 Montrose Rd., Rockville. For information, Call 881-0100.