The term 'Poolroom Surface' refers to the material used to cover the playing surface of a pool table. The most common material used is FELT, which is a four-letter word that is one of the solutions to this crossword puzzle. FELT is a fabric made from wool, fur, or other animal hair that is often used for insulation and padding. It is also used in the construction of pool tables because it provides a smooth, even surface for the balls to roll on.