’Cause this is thriller, thriller night.
Friday the 13th Undead 1989 Winter Formal
What: Tattered puff-sleeve frocks and blood-splotched cummerbunds abound at the decades-old zombie prom.
Why: Mindlessly sway to classic tunes courtesy of ’80s cover band The Engagements.
When: Fri., 9 p.m.
Where: The Bell House, 149 7th St., b/t Second & Third Aves., Gowanus (718-643-6510). Tickets online ($12) at ticketweb.com or at the door ($15).
The Bowery Diner
What: Chef Mathieu Palombino (Motorino) slings double-patty burgers, duck fat curly fries, and calamari-topped frisee salads at the new midcentury throwback.
Why: The venerable cocktail menu, crafted by The Summit Bar co-founder/mixologist Greg Seider.
When: Opens Sun. Sun.-Thurs., 5 p.m.-midnight; Fri. & Sat., 5 p.m.-2 a.m.
Where: 241 Bowery, b/t Rivington & Stanton Sts. (212-388-0052).
Girls Ticket Giveaway
What: The indie rockers’ modern blend of ’70s rock and retro pop translates into a seriously good (sold-out) live show. Trust us.
Why: Openers King Krule and Real Estate make for one heck of a lineup.
When: Sat. Doors open at 7 p.m.
Where: Terminal 5, 610 W. 56th St., at Eleventh Ave. (212-582-6600). Email email@example.com with your full name by Fri., 5 p.m., for a chance to win one of two pairs of tickets. They will choose winners at random.
Toby’s Estate Coffee
What: The Australian powerhouse debuts a 3,000-square-foot supercafe with coffee merch, espresso tutorials, Balthazar pastries, and seasonal beans roasted in-house.
Why: The recycled coffee-sack seat cushions and refurbished wood tables encourage you to sit and sip.
When: Mon.-Wed., 7 a.m.-7 p.m.; Thurs.-Sun., 7 a.m.-9 p.m.
Where: 125 N. 6th St., b/t Berry St. & Bedford Ave., Williamsburg (347-457-6160).
Cynthia Rowley Sample Sale
What: Up to 70 percent off blouses, dresses, accessories, and one-of-a-kind pieces from fall 2011.
Why: Ruched-shoulder frocks (now $259, reg. $369), the kaleidoscopic prism skirt (now $109, reg. $365), and Tamar box-flap handbags (now $140, reg. $265).
When: Today & Fri., 10 a.m.-8 p.m.; Sat. & Sun., 11 a.m.-8 p.m.
Where: 376 Bleecker St., b/t Charles & Perry Sts. (212-242-3803).
Photo: &y / Flickr