This week: art fashioned from urban decay.

SEE
Swimming Cities of Switchback Sea
What: A flotilla of ramshackle boats handmade by eco enthusiasts docks in LIC, where street artist Swoon greets them with an invented landscape along the East River.
Why: Sign us up for marine life, Capt’n.
When: Opening reception, Sun., 6-9 p.m. Performances, Sept. 11-13, 8 p.m.
Where: Deitch Studios, 4-40 44th Dr., East River, Long Island City.

HOARD
Colette x Gap
What: The Parisian darling and cutting-edge concept shop collaborates with America’s mass brand in a pop-up boutique.
Why: Collectibles, exclusives, and partnerships with everyone from Hello Kitty to Claw Money.
When: Sat.-Oct. 5. Mon.-Sat., 10 a.m.-9 p.m.; Sun., 11 a.m.-7 p.m.
Where: Next door to Gap, Fifth Ave., at 54th St.

GIVE
DailyCandy Swap-a-Rama
What: Donate new and gently used clothing to The Lower Eastside Girls Club.
Why: After dropping off goods, save 10 percent on purchases at participating boutiques.
When: Thru Sun.
Where: Some of our favorite shops.

GROOM
The First Coney Island Beard and Moustache Competition
What: Gel it, curl it, sculpt it, work it!
Why: Sideshow arts, clean shaves, and booze bash.
When: Sat. Registration and preshow, 7 p.m.
Where: Theater and Freak Bar, 1208 Surf Ave., b/t Stillwell Ave. & 12th St., Coney Island.

BUY
Project No. 8’s Super Summer Sale
What: Yes! To up to 90 percent off unique fashion finds from Margiela, Stephan Schneider, Kostas Murkudis, Sunshine & Shadow, Christian Wijnants, and more for men and women.
Why: Eight ball, corner pocket.
When: Thurs., 5-9 p.m.; Fri. & Sat., noon-7 p.m.
Where: Various Projects Studio, 215 Centre St., b/t Howard & Canal Sts., 2nd flr.

Fred Flare Super Sample Sale
What: At the new brick-and-mortar, tons of kitschy, cutesy, gifty items are mad cheap.
Why: Singles unite for the “infamous $2 box.”
When: Sat., 11 a.m.-5 p.m.
Where: 131 Meserole Ave., at Leonard St., Greenpoint (718-599-9221).