The secret is in the sauce. SHOP Kiki Loves D2 What: L.A.’s lauded Decadestwo vintage shop brings 1,500 designer pieces (LV, Chloé, Balenciaga) to NYC for four days (the first two of which are private). Why: We’ve got ten tickets to the Friday sale (get in fast, as merch will be 80 percent off). E-mail us at firstname.lastname@example.org for your chance to win. When: Open to the public Sat. & Sun., 11 a.m.-9 p.m. Where: Kiki de Montparnasse, 79 Greene St., b/t Spring & Broome Sts. (212-965-8070). PARTY Overboard: a Fundraiser for Figment What: The old majestic ferry dock is transformed into a merry port of call, with DJs, mermaids, stilt walkers, booze, and live performances from furry, xylophone-wielding mascots. Why: Wear your finest nautical gear and curse like a sailor. When: Fri., 9 p.m.-4 a.m. Where: Battery Maritime Building, 10 South St., at Whitewall St., slip 7. Tix and info at figmentnyc.org. READ Artbook at X What: High-concept art lover’s bookstore in the old DIA space by X Initiative (with outposts at P.S.1 and installation appearances at Basel, The Armory, etc.). Why: Make yourself resourceful. When: Thru Mar. 2010. Opening party, Sat., 5-7 p.m. Wed.-Sat., 11 a.m.-6 p.m. Where: 548 W. 22nd St., b/t Tenth & Eleventh Aves. DINE The Eighteenth What: Artsy caterer Anne Apparu’s bohemian dinner is all about “life’s magic” (the last party took place in a big inflatable bubble). Why: Culinary insanity for a mere $27. Bring your own beverages. When: Make reservations now for — you guessed it — May 18. Where: East Village location details to come. Info at email@example.com. SAVE Lighthouse International Fashion Fund-Raiser What: Celebs and designers (Jason Wu, Christian Lacroix) donate goods — black Roger Vivier pumps for $125, Herve Leger dresses for $100, Chanel suit jackets for $100, Dior coats for $60. Why: Put the fun in fund-raising. When: Thurs.-Sat., 11 a.m.-7 p.m.; Sun., 11 a.m.-5 p.m. Where: 110 E. 60th St., b/t Park & Lexington Aves. Tix and info at poshsale.org. BUY Fred Flare’s Carnival of Cute What: Keep big bucks in your pocket while buying little bits of kitsch! Lomography cameras for $20, sunglasses for $5, Paul Frank swimsuits for $10. Why: Then give it all away to kids who need it more than you. When: Sun., 11 a.m.-5 p.m. Where: 131 Meserole Ave., at Leonard St., Greenpoint (718-349-1257). Archetype and Vivienne Westwood Sample Sales What: Digby & Iona, Fremont, Quail, Eskell, and Hengst are wholesale and below at Archetype. At Vivienne Westwood, draw raffle tix ($5-$1,000) before shopping the collection — now up to 70 percent off. Why: Two sales that fit (your schedule) like a glove. When: Archetype, Thurs., noon-7 p.m.; Fri. & Sat., 10 a.m.-7 p.m. VW, Thurs. & Fri., 10 a.m.-8 p.m. Where: Archetype, 676 Broadway, b/t Great Jones & Bond Sts., 2nd flr. VW, Scatola Showroom, 544 W. 27th St., b/t Tenth & Eleventh Aves., 6th flr.