Most riders, aside from flatlanders, use two-piece bars. Four-piece bars, outside of flat, are becoming more and more a thing of the past. Five/six/seven/eight/ten-piece bars are very, very rarely seen anywhere outside of a flatland bike, because there's no real need for them - the only real exception I can think of are the old five-piece Boss Racing bars, which, frankly, kick ass. Cecil Johns, never forget.