Habit appeared to happen overnight, with 4PlayBK owner Laura Kleinman slipping into a long-vacant Park Slope storefront with nary a sign to be seen. Interior reflects successful Flea furniture haul, showcases baubles channeling the Anthropologie aesthetic. Colorful curtains set off dressing rooms fit for slipping into flirty dresses, skirts, and tops for a youngish crowd. Prices range from sensible to splurgey. Venerable collection of vegan handbags for cruelty-free accessorizing.