All dressed up and everywhere to go.WANDERWithin the Land of Ash What: Hop between neighboring warehouses packed with multiple floors of dancing, afterlife installations, and extreme revelry. Why: Lady Circus members hidden in the Brewery rafters, the furniture factory-turned-three-story hip-hop labyrinth, and tribal house sets inside the abandoned, disco ball-strewn Omega Plastics space. When: Sat., 7 p.m.-7 a.m.Where: Start at 260 Meserole St., b/t Waterbury St. & Bushwick Ave., Bushwick. R.S.V.P. online at facebook.com. Admission is $15 before 9:45 p.m., $25 after.BOP ALONGWith The DrumsWhat: Brooklyn surf-poppers rock Hammerstein Ballroom with the Neon Trees.Why: The first five readers to e-mail firstname.lastname@example.org win a pair of VIP tickets.When: Sat., 8 p.m.Where: 311 W. 34th St., b/t Eighth & Ninth Aves.PICTURE ITRe:Galli Blonde (a Sissy Fix)What: The inimitable Justin Bond and his femme, homo, and transgendered players (a.k.a. the House of Whimsy) inhabit the identities of gender variant priests (The Order of Galli) and the divine Roman goddesses they worship. Why: We can’t decide what’s more fantastic: the webbed curtains crafted from hair extensions or a gravity-defying rooster wig.When: Today-Sat., 8 p.m.Where: The Kitchen, 512 W. 19th St., b/t Tenth & Eleventh Aves. (212-255-5793). Tickets ($12-$15) online at ticketweb.com.ATTENDThe Vintage Tea SocialWhat: Don your dandiest threads for an afternoon tea-inspired Halloween gathering. Why: Complimentary photo portraits, costume fittings, Love Joy Sweet Treats pastries, and hot sips.When: Sat., 1-3 p.m.Where: Harlem Pop, 2037 Fifth Ave., at 126th St., 2nd flr., Harlem. R.S.V.P. online at vintageteasocial.eventbrite.com.GAWKMoveWhat: Fashion goes live when the collaborations between 24 all-star designers (Marc Jacobs, Alexander Wang, Rodarte, and more) and artists take over MoMA PS1.Why: We can’t wait to see what these artist/designer pairs have cooked up: Tauba Auerbach and Ohne Titel, Kalup Linzy and Diane von Furstenberg, and Terence Koh and Italo Zucchelli.When: Sat. & Sun., noon-6 p.m.Where: 22-25 Jackson Ave., at 46th Ave., Long Island City (718-784-2084).DRESS UPYves Saint Laurent Friends and Family SaleWhat: Up to 75 percent off men’s and women’s ready-to-wear, costume jewelry, shoes, handbags, and more.Why: Belts for $50, scarves and sunglasses for $100, plus safari dresses (were $1,295, now $300) and tuxedo jackets (were $2,195, now $400). When: Today & Fri., 8 a.m.-8 p.m.; Sat., 9 a.m.-4 p.m.Where: Metropolitan Pavilion, 125 W. 18th St., b/t Sixth & Seventh Aves.Photo: Courtesy of Within the Land of Ash Up to 60% off ShaeKnits should be just as easy to wear as everything else, right? Stay cool in Shae’s lightweight textures, short sleeves, and silk paneling, or cozy up in the smart sweater jackets and cardis for up to 60% off on Swirl.