Let’s make September an affair to remember. BUY Valentine Gallery What: Mad-for-plaid new indie label channels sassy schoolgirls. Why: You’re a quick study. When: In stores now. Where: Frock Shop, 6500 Phinney Ave. N. (206-297-1638). Fremont First Friday Fashion Night What: Get 15 percent off new fall merch at boutiques Horseshoe, Impulse, Lambs Ear, Essenza, Flit, and more. Why: You’ll fall hard. When: Fri., 5-8 p.m. Where: The center of the universe. SEE Mumble Without a Cause What: Screenings and director appearances from the much-buzzed-about, twentysomething-focused mumblecore movement. Why: Could be just your type (or total hype). When: Thru Oct. 3; first screening, Fri., 5 p.m. Where: Northwest Film Forum, 1515 12th Ave., b/t Pike & Pine Sts. (206-329-2629). HEAR The Brunettes What: Adorable Kiwi boy-girl duo is a little bit bubblegum, a little bit baroque. Why: Brunettes have more fun (especially after touring with Rilo Kiley, The Shins, and The Postal Service). When: Thurs. Doors open at 8:30 p.m. Where: The Crocodile Cafe, 2200 Second Ave. (206-441-5611). Tickets online at ticketweb.com. GROOM Your Mop What: Belltown’s beloved Vain Salon’s new, equally edgy Ballard location. Why: They’re scissor sisters. When: Tues.-Sun., noon-8 p.m. Where: 5401 Ballard Ave., at 22nd Ave. (206-706-2707).