And now, for our next trick: Watch this weekend disappear.

HEAR and DANCE
Quiet Disco
What: Bring or borrow FM headphones, then plug in and dance “like crazy” to live DJ tunes that no one else can hear.
Why: You like to move to your own beat.
When: Sat., 4-10 p.m.
Where: Washington Sq. Park, big lawn, NW quadrant.

SEE
Billy the Mountain and Other American Card Tricks
What: Funny rock opera about the romance of war propaganda, inspired by Frank Zappa.
Why: Giddyup.
When: Sat., noon. Aug. 22, 24 & 25, various times.
Where: Harry de Jur Playhouse, Abrons Art Center, 466 Grand St., at Pitt St. More info online at stridinglion.org.

March of the Penguins
What: Bring a blanket for the sunset screening. (Snacks are provided by the neighborhood.)
Why: Black tie optional.
When: Fri., 6:30 p.m. Film begins at dusk.
Where: La Casida Community Gardens, 223 E. 119th St., at 3rd Ave. More info online at nyrp.org/events.htm.

EAT
The Milla Jovovich, The Andy Warhola, The Leon Trotsky
What: Veselka’s new offshoot in the park serves up sandwiches named after famous Ukranians.
Why: Pierogi lovers rejoice.
When: Mon.-Fri., 7:30 a.m.-7 p.m.; Sat.& Sun., 7:30 a.m.-9 p.m.
Where: First Park, First Ave., b/t 1st. & Houston Sts.

BUY
Aero Summer Sale
What: Fifty to 75 percent off tabletop, furniture, and gifts from the sleek homeware spot.
Why: All aeros point to shopping.
When: Starts Fri., 11 a.m.-6 p.m. Thru Sept. 2
Where: 419 Broome St., b/t Crosby & Lafayette Sts.