Jennifer Crupi's Empathy Table doesn't have any legs. It rests on the laps of its two users and remains stable so as long as both people maintain a welcoming posture:

In this work, I seek to point out how one can show agreement with another by assuming the same posture. As a result of interacting with this table, the two users are forced to be in "empathy" with one another, a comfortable conversing distance apart.

Link -via Design Boom