Red light. Green light.

GLIDE
Uniqlo’s High Line Rink
What: Lace up for a few laps around the 8,000-square-foot outdoor roller rink; make a pit stop at the adjacent Cube, the Japanese brand’s glowing pop-up.
Why: The first 500 skaters today thru Sat. get in free.
When: Thru Sept. 26. Sun.-Wed., 11 a.m.-10 p.m.; Thurs.-Sat., 11 a.m.-11 p.m.
Where: The Lot, W. 30th St., at Tenth Ave. Admission is $12 (including skate rental).

BELT IT
The Newsies Sing-Along
What: Follow the subtitles for a raucous cinematic experience complete with interactive trivia, newsy drinks, a costume contest, and a dance-off.
Why: Teenage Christian Bale really delivers the goods.
When: Fri., 8 p.m.
Where: The Bell House, 149 7th St., b/t Second & Third Aves., Gowanus (718-643-6510). Tickets ($8) online at ticketweb.com.

SEE
Warby Parker Shop-in-Shop
What: A spectacle of spectacles. Check out the charitable brand’s first collection of vintage-inspired shades as well as classic eyeglasses, all just $95.
Why: For every pair of sun- or Rx glasses sold, Warby Parker donates a pair to a person in need.
When: Mon.-Fri., noon-6 p.m.
Where: Bird, 203 Grand St., b/t Bedford & Driggs Aves., Williamsburg (718-388-1655). For an appt., call 888-492-7297 or email help@warbyparker.com.

SHAKE
Mad Decent Block Party
What: A free all-ages dance fest from Diplo’s record label, with NY-based Gang Gang Dance, The Hood Internet, and Zeds Dead.
Why: Dubstep, hip-hop/indie mash-ups, and Baio’s (of Vampire Weekend) eclectic DJ set get the wallflowers on the floor.
When: Sat., noon-9 p.m.
Where: South Street Seaport, Pier 17. To R.S.V.P. (required), go to maddecentblockparty.com.

LAUGH
Eugene Mirman and Pretty Good Friends
What: The Brooklyn-based Flight of the Conchords regular and side-splitting pals Patton Oswalt, Todd Barry, and Kristen Schaal take the stage.
Why: A special set from musical guest They Might Be Giants.
When: Fri., 5:30 p.m.
Where: Williamsburg Waterfront, 93 Kent Ave., b/t N. 7th & N. 8th Sts., Williamsburg. Admission is free.

Photo: Thinkstock