The free online bingo game sites even offer cash prizes. They offer chat rooms for the players to interact with each other either during the game or even after the game. With better graphics, sounds and software, the bingo sites try and outdo each other for attracting more and more players. It's been estimated that at least 15% of the bingo players are women, who play solely for the purpose of enjoyment. The online games where the bets are wagered stands at more than $5 billion. No wonder that each and every bingo site wants a slice of this cool offers.