Dimples are used on golf balls to promote the formation of a turbulent boundary layer that stays with the ball longer as it travels through the air, therefore greatly decreasing the pressure drag experienced by the ball. The increased skin friction drag created by the dimples on the ball's surface is very small compared to the pressure drag reduction that it benefits from; therefore, the overall drag decreases as a result of the dimples. This is useful because a golf ball needs to travel far distances with a potentially large amount of air resistance. Conversely, an airplane does not need dimples on its wings or body because it is already aerodynamic in shape (instead of blunt-faced like the golf ball) and therefore the pressure drag is already reduced such that adding dimples would actually increase the skin friction more than it would decrease the pressure drag, and the overall drag on the airplane would likely increase as a result.
My question is, based on this knowledge, would ping pong balls travel faster as a result of adding dimples? Would they benefit from dimples at all? They have a similar size and shape but much smaller mass than golf balls, which is where my uncertainty comes from.