Is there a better setting for a Halloween party than a knife shop a few blocks away from the Gowanus Canal? We doubt it, but come judge for yourself at the SUPERFUNd Masquerade at Cut Brooklyn on Friday night. The evening promises a costume contest with great prizes, vodka and champagne punch, Lagunitas beer, and all the Halloween candy you can eat. As an added perk, all proceeds from the $17 tickets benefit a new production of Babes in Toyland by Little Lord Theater Company. Also in Gowanus on Friday is a costume swap at the new, Brooklyn outpost of Build It Green, from 3 to 6 at 69 9th Street, for adults and kids. Details here.