Boo.PARTYMission TreatWhat: Halloween starts early as a bevy of Mission storefronts (Arkay Workshop, Philz Coffee, Local: Mission Eatery) hosts a spooky microhood bash down 24th St.Why: Don’t miss the live mural painting outside Precita Eyes, free baklava served by Phil himself, and a Dexter-inspired photo booth.When: Thurs., 7-9 p.m.Where: 24th St., b/t Shotwell & Bryant Sts.FEASTHalloween at Bar AgricoleWhat: Go as a (zombie?) gourmand to this $40 three-course dinner inspired by The Prisoner at the acclaimed SoMa haunt.Why: Save $5 (and gain street cred) when you wear a costume.When: Sun., 5 p.m.-1 a.m.Where: 355 11th St., b/t Folsom & Harrison Sts. (415-355-9400).SHOPWelcome Stranger What: Celebrate the opening of the new rugged American men’s shop from the co-owners of Azalea and Tobi.com with free cocktails, a photo booth with Naked & Famous Denim’s founder, and much more.Why: Mention DailyCandy when you play a game of darts to get 20 percent off.When: Thurs., 7-9 p.m.Where: 460 Gough St., b/t Grove & Hayes Sts. (415-891-9883).SNAGAll My Friends Are Dead SigningWhat: Meet the masterminds behind the cult “children’s” book at Dog Eared Books and have them sign your well-loved copy.Why: Get inspired to find your own million-dollar meme.When: Sat., noon-5 p.m.Where: 900 Valencia St., at 20th St. (415-282-1901).DRESS UPMos Eisley Cantina: a Star Wars-Themed Costume PartyWhat: Bust out your best Admiral Ackbar getup to enjoy Tatooine-inspired cocktails, screenings of Star Wars parodies, and live music from Figrin Dan and the Modal Nodes.Why: Cash prizes for the best costumes.When: Thurs., 8 p.m.-2 a.m.Where: CellSpace, 2050 Byrant St., b/t 18th & 19th Sts. Info at 415-820-3907. Tickets ($5) at brownpapertickets.com; free if in costume.Photo: D Sharon Pruitt / FlickrUp 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.