Using an antique buffet or farm table as a kitchen island, would look great in an shabby chic or French Country style kitchen. The top can be replaced with granite, marble or a butcher block countertop.
Also, after some additional changes, these pieces could be used as a bathroom vanity.
For a dining room, a Rococo Sofa could be reupholstered and used for seating.
Also, instead of purchasing an expensive bar cart, you could use a vintage buffet.