Directors, writers and cinematographers will host a pre-inaugural ball bash today after Bill Clinton is sworn in as the 42nd president.The event is being co-sponsored by the Directors Guild of America, the Writers Guild of America West and the American Society of Cinematographers. Among the celebs skedded to attend: Lauren Bacall, Ed Begley Jr., Marilyn and Alan Bergman, Joseph Bologna and Renee Taylor, Martha Coolidge, Michael Crichton , Geena Davis, Richard Dreyfuss, Milos Forman, William Fraker, Anjelica Huston, Arthur Hiller, James Earl Jones, Jack Lemmon, Donna Mills, Bruce Paltrow, Del Reisman, Phil Alden Robinson, Martin Scorsese, Ron Silver, Steven Spielberg, Mary Steenburgen, Harry Thomason and Linda Bloodworth-Thomason, Kathleen Turner, Henry Winkler and Robert Wise. The event is the latest in a week’s worth of entertainment gatherings. Among pre-inauguration highlights was the “Reunion on the Mall,” which concluded Monday with surprise guests Hillary and Chelsea Clinton taking in some of the sights and sounds that attracted more than 360,000 during its two days. Concertgoers Sunday had their choice of nouvelle rockers Blues Traveler, Taj Mahal singing “Blues With a Feeling,” Cajun band Beausoleil, or Broadway stars singing excerpts from show tunes. Rita Moreno sang and danced to “America” from “West Side Story” backed by a full orchestra. Monday’s musical lineup featured Los Lobos, Toad-the Wet-sprocket, Peter, Paul & Mary, and Salt-N-Pepa, whom Chelsea Clinton caught performing “Let’s Talk About Sex,” their hit single that advocates sexual safety. The Grateful Dead’s Bob Weir and bassist Rob Wasserman played while the unmistakable fragrance of marijuana filled the air, lending an air of Woodstock to the show. At the Kennedy Center Monday, Tennesseeans held a gala for natives Al and Tipper Gore. Produced by Jonathan Tisch and billed as a “Taste of Tennessee,” show was hosted by “Designing Women’s” Dixie Carter. Despite a plethora of talent in the Volunteer State, there were few superstars to be found. Gospel singer Bobby Jones and country/Broadway star Gary Morris contributed moments of bravado, but one wondered why the veep-to-be had to see Ricky Skaggs perform to tape or Carter sing a wobbly “Grand Old Flag.” The Presidential Gala aired live last night on CBS.