We are eating on the floor these days. The main reason is because sitting cross-legged on the floor encourages better fetal positioning. Any position leaning forward with legs open is a good position for mom. Leaning back with legs crossed = bad fetal positioning, or so we have been told. (it would seem that laboring flat on one's back might be the second worst position, trumped only by the hypothetical situation of laboring upside down)
I suppose another reason would be because we are having Korean food these days, so eating on the floor just feels right.
(the hideous picture quality is because I left my camera at the in-laws', and I am forced to use my free phone's camera. If it's a free phone and has a camera, it isn't a very good one)