There are several different types of pool balls that can be found in various areas throughout the Capital Wasteland and Mojave Wasteland. In Fallout 3 pool balls can be used as a source of ammunition for the Rock-It Launcher, however with the removal of the Rock-It Launcher in Fallout: New Vegas they no longer serve any use.
List of the various different pool balls that appear in-game:
- Cue ball
Though not often found as random junk, they are frequently seen near or on pool tables. Some locations are The Muddy Rudder, Rivet City market, slaver barracks, Old Olney, etc. The lucky 8-ball can be obtained from Timebomb in Big Town.You can also find them in Mess hall & munitions storage.