They're both fun, but I have to go with: Pool Table
~Ping pong sounds are annoying unless you are playing it.
~Ping pong balls are more likely to fly around the room and get lost than pool balls.
~I would be more likely to strike up a game of pool with a client or colleague than ping pong. Pool is a good game for maintaining conversation while playing.
~Pool tables (usually) look nicer.
Or get both ;)

