That’s cool.LISTENFern KnightWhat: The psychedelic folk rock quartet plays tunes from its just-released album, Castings.Why: Be sure to check out laptop-loving Arlington indie band The Plums and Sonic Youth producer Martin Bisi.When: Sat., 10:30 p.m. Where: Comet Ping Pong, 5037 Connecticut Ave. NW (202-364-0404). Admission is $10.DRINKWinter Ice BarWhat: Donovan House transforms its rooftop lounge (ADC) into a wintry wonderland with outdoor fire pits and a bar made of ice. Why: Adjust your internal body temp with cocktails ($8-$17), like an Ice Flurry (lychee puree, orange bitters, and vodka) or Morello Fire (nigori sake, chili-infused vodka, and morello cherry puree).When: Thru Feb. 28. Fri. & Sat., 5-10 p.m. Where: 1155 14th St. NW, on Thomas Cir. (202-379-4366).BUYAnnual Warehouse SaleWhat: Old Town boutiques including The Shoe Hive, Periwinkle, Apple Seed, and La Cuisine take up to 85 percent off store merchandise. Why: Steals like Tory Burch rain boots for $30.When: Sat., 9 a.m.-4 p.m.Where: The George Washington Masonic Memorial, 101 Callahan Dr., Alexandria.SEECrystal CoutureWhat: Runway and trunk shows, pop-up boutiques, a T-shirt design competition, and DJ sets.Why: Brand of the Free, ADMK Jewelry, Tristan Blake Collection, and Aidah Collection and other local lines.When: Thurs.-Sat., 6-10 p.m.Where: 1750 Crystal Dr., Crystal City. Admission is free.MUNCHSuper Bowl SnacksWhat: Beer cocktails, finger foods, and other winning Game Day recipes for your big party.Why: Score points with poblano bacon green chili, Reuben balls with Thousand Island dressing, mulled wine, and more.When: Sunday, silly.Where: Online at dailycandy.com.Photo: Courtesy of Fern Knight Up to 50% off Leigh & LucaOne-up the slushy ice (or even just winter dreariness) with colorful, screen-printed scarves made exclusively for Swirl. They’re up to half off on our sample sale site.