Actors Elisabeth Shue and Jonathan Silverman and MTV’s Melissa Rivers top 400 celebs and young Hollywood professionals skedded to support Mike Woo’s L.A. mayoral campaign tonight at 7:30 p.m. at Club Tatou, 233 N. Beverly Drive. Tickets are $ 35. For information, call Dana Rao, (213) 626-5573. Woo faces Richard Riordan in Tuesday’s election.

In a move that had been expected, MTM has canceled the syndicated firstrun sitcom “The New WKRP In Cincinnati” because of the difficulty involved in recouping high production deficits when the series goes into reruns. The expansion of the Fox weblet and the proliferation of high-cost firstrun hour programs would also force many stations to displace “WKRP” from key time periods this fall.

Thirty-nine local TV personalities have been set as presenters by the Academy of Television Arts & Sciences for this Saturday’s 45th annual Los Angeles Area Emmy Awards. Producer of this year’s presentation, which will be held at the Pasadena Civic Auditorium, is Charles Lange.

The nation’s oldest theater chain, Loews Theaters, returned to Gotham Tuesday after a six-year sojourn in New Jersey. Corporate headquarters for the 891 -screen circuit will be in the 711 Fifth Ave. building, which houses several companies within the Sony Pictures Entertainment family. The longtime Manhattan fixture left for Secaucus, N.J., Sept. 28, 1987.

Roy Christopher, five-time Emmy-winning production designer, has been signed by producer Gary Smith for Sunday’s Tony Awards show, which will be hosted by Liza Minnelli and directed by Walter Miller. Christopher won four of his five Emmys for designing Oscarcasts. CBS-TV will carry the awards show, which will celebrate the 100th anniversary of Broadway theater.

Howie Mandel will be the special guest host for a comedy benefit for Covenant House Thursday at 7:30 p.m. at the Henry Fonda Theatre in Hollywood. Performers will include Pauly Shore, Bob Saget and Richard Jeni. Covenant House helps homeless and runaway kids. Information: (213) 464-0808.

J2 Communications said its National Lampoon unit will team with TV producer Vin Di Bona to develop a new comedy series titled “National Lampoon’s Desire Under the Magnolias.” Di Bona, best known for ABC’s “America’s Funniest Home Videos” and “America’s Funniest People,” will produce the new program.

Arnold Schwarzenegger said hasta la vista to the President’s Council on Physical Fitness and Sports. The actor and bodybuilder, appointed chairman by former President Bush nearly four years ago, resigned in a letter to President Clinton last week.

The widow of jazz composer Charles Mingus presented his scores, recordings, photographs and other memorabilia to the Library of Congress Tuesday. The library purchased the collection from Sue Mingus for an undisclosed price last year. Mingus died in 1979.

Debbie Slavkin, former exec VP for educational programming distributor IA Entertainment, has formed her own sales company, Debbie Slavkin & Associates, based in Los Angeles. Slavkin will continue to represent more than 600 hours of programming previously available from IAE, offering such series as “Taking the Lead,””Earth, Revealed” and “U.K. U.S. You, Too.” Slavkin previously was director of program services at Lorimar-Telepictures.

“Roc” star Charles S. Dutton is spearheading a national campaign to use L.A.’s Marcus Garvey School as a model for educating inner-city children across the United States. Dutton was joined at a press conference Tuesday by Dionne Warwick, Ice-T, Cliff Powell and John B. Williams.

Actor Perry Stephens joins the cast of CBS-TV’s “The Bold and the Beautiful.” Stephens, who will play attorney Steven Crown, is perhaps best known for a seven-year stint as Jack Forbes on the daytime series “Loving.”