Piano Six Hands

There is also a small repertoire of pieces for three people to play at one piano. This is called Piano six hands. These pieces are often fun pieces which are not too hard to play, although there are examples of serious pieces - see the separate wiki article. The three people need to be good friends, because it is a bit of a squash. The player at the bottom ought to do the pedalling but it may be easier for the middle player to do it.

Source:http://simple.wikipedia.org/wiki/Piano_duet