Origin of the Poolroom

Back in the day before state run lotteries - local bookies would run numbers games and these tickets for the "pool" were often sold in a "poolroom". The numbers would be drawn once or twice a day and in order to fill the time between drawings - the operators at many locations put in billiards tables. Billiards was changed or Americanized by adding pockets and creating the game pocket billiards which we now know simply as pool.