Ping pong ball

The Ping Pong ball is a miscellaneous item in Fallout: New Vegas.

Characteristics
They are small white balls that seem to be set up for a game of beer pong, on a desk next to some cups.

Location
Three of these can be found on a desk, on the ground floor of The King's School of Impersonation in Freeside in the room with four beds on the floor.