This weekend, urine it to win it.

BID
Pee It Forward
What: Empty Bottle redid its bathroom floors; remnants were cleaned, lacquered, and made into arty coasters, which are now being auctioned off.
Why: The news leaked that proceeds go to the American Liver Foundation.
When: Thru Oct. 22.
Where: Online at 32auctions.com.

SHOP
Dose Market
What: The flea returns with another bundle of indie goodness, including vintage timepieces from Division Street Watch Co., fresh juice from Bleeding Heart Bakery & Cafe, and Ianneci statement jewelry.
Why: Pork and cilantro dumplings served by Bill Kim himself (Belly Shack, Urbanbelly), Frei’s fall collection, and designer Lisa Kingsley’s French linen bags and just-launched jewelry line.
When: Sun., 10 a.m.-4 p.m.
Where: River East Art Center, 435 E. Illinois St., b/t Lake Shore Dr. & McClurg Ct. Tickets at the door ($10) or online ($8) at dosemarket.com.

HEAR
The Hideout Block Party
What: Andrew Bird headlines the season’s last outdoor music rager, which also gives great smaller-name acts, like dub/electro group The Eternals, the floor.
Why: It’s the perfect end to your Pitchfork/Lolla/North Coast-filled summer.
When: Sat., noon.
Where: 1354 W. Wabansia Ave., at Ada St. (773-227-4433). Tickets online ($25) at hideoutchicago.com or at the door ($35, cash only).

EAT
Pig Pairing Dinner
What: Balsan restaurant teams up with local brewer Finch’s Beer Co. for a family-style, snout-to-tail feast ($58).
Why: Go from blood sausage with Alsatian onions and roasted apples to stuffed pig’s feet.
When: Sept. 29, 6-8 p.m.
Where: 11 E. Walton St., at State St. Reservations to 312-646-1400.

TRADE
The Denim Lounge Denim Drive
What: Hand over a pair of old jeans and the boutique will give you 10 percent off a new pair. Trade in two pairs, and you’ll get 20 percent off.
Why: Chase the blues away.
When: Thru Sept. 30.
Where: 43 E. Oak St., at Rush St. (312-642-6403); 2039 W. Roscoe St., at Damen Ave. (773-935-2820).

Photo: Courtesy of Empty Bottle