A masterful weekend of suspense.PARTYHitchcock and HandcuffsWhat: Get your Tippi Hedren on at a pre’ween party tricked out with free tapas (garbanzos fritos, pot stickers), $1 PBRs, and a dance space that pays homage to The Birds.Why: DJed tunes from the ’60s thru today. When: Tonight, 10 p.m.-1 a.m.Where: Estragon, 700 Harrison Ave., at E. Brookline St., South End (617-266-0443).SHOPSimon PearceWhat: The beloved Vermont-based home store upgrades to massive Back Bay digs with white oak floors, bay windows, and a comprehensive selection of handcrafted stemware, accent pottery, elegant glass lighting, and farm-style furniture. Why: Stock up early on turkey table goods, then reboot at Pinkberry’s spankin’ new Newbury outpost down the street (opens tomorrow).When: Opens Sat. Daily, 10 a.m.-6 p.m.Where: 103 Newbury St. (617-450-8388).DRINKFireside Chat: AbsintheWhat: Proprietor Jim Solomon cozies up hearthside to consider the just-legalized libation and its hallucinogenic influence on Paris creatives from Wilde to Baudelaire.Why: Guests enjoy three Green Fairy brews (including one set aflame) with hearty accompaniments like steak bites with horseradish cream. When: Sat., 3-4:15 p.m.Where: The Fireplace, 1634 Beacon St., Washington Square (617-975-1900). Admission is $25.WATCHHalloween Horror Movie MarathonWhat: Fuel up on Red Bull for twelve straight hours of classic and cult flicks, from the grossly hysterical (Re-Animator) to the outright insane (Japanese cannibalistic fantasy-horror Hausu). Why: Psychic readings, costume contests, and live burlesque keep the synapses firing. When: Sat. & Sun., midnight-noon.Where: The Coolidge Corner Theatre, 290 Harvard St. (617-734-2500). Tickets ($15-$20) online at coolidge.org.EATMet Back Bay OpensWhat: Kathy Sidell unveils a brownstone-housed throwback with TV-adorned game room, contemporary American menu (chopped salads, tableside tartares), and a year-round heated patio.Why: Head to the plush, oak-adorned Library bar for old-timey drinks like the Blinker (Michter’s rye, fresh grapefruit, and raspberry syrup) with chipped ice.When: Daily, 11:30 a.m.-1 a.m.Where: 279 Dartmouth St. (617-267-0451).Photo: Courtesy of Universal Pictures 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.