I am very fond of placing small pieces of Antique furniture in bathrooms. I think it adds an element of coziness. It also adds interest and personality to a room which we usually don't think about furnishing.
Whether it's a small table {like above} to place some towels on & a beautiful tray with lots of perfume and lotion on for your guests or a lovely old chair upholstered in a pretty fabric, I think it's a great look.
In the Gumdale house I have been working on I suggested this concept to the client and she went with it. We painted the old pieces we found for her bathrooms white and they look fantastic.
So, if you have room for a lovely little old table or chair or even an old mirror in your bathroom my advice is...go for it!
Oh and while we're on the subject of furnishing bathrooms - I also love little paintings in bathrooms too!!