A Bar Billiards table have four mushrooms. In this game players played with small skittles, the purpose of which is to provide a hazard - players must avoid toppling them while building a score. The problem with skittles is that they are thin and so can easily fall into the holes and get lost or stuck. Additionally, in most variations of the game, the holes are blocked when only one ball is left on the table and it is convenient if a mushroom can be popped into a hole to achieve this.
