Wrap yourself in a costume and you can Unwrap Your Candy for less. Dress up and Naked Boys Singing will dress down for half-price.

Come Halloween, Off-Broadway's morbid new comedy and clothes-free musical both have offers for the spookiest day of the year. Naked Boys Singing will sell $25 tickets to anyone wearing what they aren't — a costume, while Unwrap Your Candy will take $10 off their price for any ghouls or goblins trick or treating at the Vineyard on Oct. 31.

Candy, written and directed by Quills scribe Doug Wright, is especially apt for an evening of scares. Featuring a grisly auction, a mansion that was home to a horrific murder, a baby who romances, then abuses his mother from the womb and the horrors of modern theatre going, Unwrap Your Candy's four dark comedies are "The Bone Violin," "Wildwood Park," "Baby Talk" and the title play.

Naked Boys Singing! is a sometimes comic, sometimes serious, all singing, all dancing revue of tunes celebrating mankind sans costuming. The original 16-song score includes such numbers as "Fight the Urge," "The Bliss of a Bris," "Muscle Addiction," "Nothing But the Radio On," "Members Only" and "Window to Window." The musical comedy revue opened in New York July 22, 1999 after a successful run at the Celebration Theatre in Los Angeles.

Tickets to Unwrap Your Candy are $40. The Vineyard is located at 108 E. 15th Street. For ticket information, call (212) 353-3366. Tickets to Naked Boys Singing are $50-$35 or $70 for the first two rows. The Actors' Playhouse is located at 100 Seventh Avenue South below Christopher Street. Call (212) 463-0060 for information. — By Christine Ehren