DB Fletcher Furniture Design has a couple of different "folding" and expanding table designs that have to be seen to be believed.
They are aimed at the HIGH end yacht, and I would love to have one in my house, but the neat idea and craftsmanship are certainly worth checking out.
Their capstan tables are beautiful.
The "rising & furling tables" are a slick design that gives me ideas 🙂 (yes, I know they have a patent pending… don’t worry)
Make sure and check the movies (more on the web page) so that you can see how these actually operate!