Treehouse Brooklyn Block Party

This eco-friendly boutique is celebrating its sixth birthday by knocking 40 percent off its vintage and handmade jewelry and clothing, such as Sirius bamboo jersey floral dresses for $96 (were $120). House label Sirius Lux baubles are 20 percent off, including neon-and-jade necklaces for $48 (instead of $60). When you’re shopped out, munch on gratis snacks from Emily’s Pork Store. Also look for deals and music from surrounding shops: Moves Brooklyn will have Portland band Concrete Floor (soundcloud.com/concretefloor) jamming in its backyard.