Situated on an elegant Park Slope corner lot where Sixth Avenue meets Garfield Place, the house at 267 Sixth Avenue has a rare and unusual history. Built in the 1870s, the building is the former home of the Swedish American Athletic Club. In its current incarnation, the 7,200 square-foot house is comprised of a 5,400-square foot owner’s triplex over a 1,800-square foot three-bedroom rental apartment–asking $5.999 million. In its athletic club days, the building featured a 90-foot ballroom, a billiard room, a bowling alley and a lounge with a 15-foot cocktail bar. The bar remains intact and the bowling alley (not pictured, unfortunately) lives partially unaltered on the home’s lowest level.