yeah... most people are practicing their pong skills... while you are tricking out your table! (i did something similar when i realized that i suck at beer pong :-/)
you don't need anything to crazy... you can probably pull of this project with some kind of multiplexer and a proto board...
the logic is that you can have multiple inputs and control multiple outputs...
i.e.
2 inputs to 3 outputs
Combinations:
Case 1:
input pin 1: low
input pin 2: low
output pin 1: low
output pin 2: low
output pin 3: low
Case 2:
input pin 1: high
input pin 2: low
output pin 1: high
output pin 2: low
output pin 3: low
Case 3:
input pin 1: low
input pin 2: high
output pin 1: low
output pin 2: high
output pin 3: low
Case 4:
input pin 1: high
input pin 2: high
output pin 1: low
output pin 2: low
output pin 3: high
there are tricks you can use for leds like alternate blinking input1, then blink input 2... this will blink output pin 1 then output pin 2...
if you do it fast enough, it isn't even noticeable to the human eye.
or you could have them flicker obnoxiously to annoy the enemy 