JUST A few days left to catch Elaine May's "Adult Entertainment" work of art, starring the one and only Danny Aiello. The show closes next Sunday at Variety Arts Theater. This comedy about the world of adult film was directed by the legendary Stanley Donen, who did those classic musicals "Singin' in the Rain" and "Funny Face." Here, his actors dance to a different tune ... PLACIDO DOMINGO, Lang Lang, Salvatore Licitra, Audra McDonald, Gil Shaham and other surprise guests fete and thank Beverly Sills, recognizing her eight years running Lincoln Center. It takes place April 14 at the State Theater. Barbara Walters, Carol Burnett and I will do our stuff as hosts. Call 212-875-5461 ... ALSO on this date, The Actors Company Theater celebrates 10 years of rediscovering little-known plays. Their gala "Schlepping the Seltzer" takes places at the Metropolitan Club. Dinner and a "mockumentary" will dominate. Call 212-645- 8228 ... THIS IS a popular date! That same day, the Tony folks give a lunch at the Pierre to celebrate Broadway's women producers. I won't list them, but they are all terrific. Clarissa and Edgar Bronfman Jr. host; Harvey Fierstein is emcee. This benefits the American Theater Wing's education programs. Call 212-765-0606 ... THE GAWKER Web site has me locked in a closet, wondering about my invite to Barbra Streisand's birthday party. Hmm, don't they know Babs doesn't have a thing to do with me? I'm on her Z list, the last person she'd invite April 24!