- Gamble less frequently than men.

- Place smaller bets than men.

- Less competitive and play to have fun.

- Enjoy games such as Bingo and Slots.

While there are exceptions to every rule, above mentioned set of observations seem to hold true for most part. A simple and very plausible explanation may be found by taking into account "risk taking" behavioural aspect of a typical male. Since a typical male is more likely to possess and display risk taking behavior than a typical female, so it stands to reason that a typical male is more likely to gamble competitively and for much higher stakes than a typical female.

Bonus features and free spin games:

Unlike classic game of Blackjack or Roulette, most Slot machines offer bonus features which include free spins and a chance to win real money for free.

Eating, drinking and smoking:

Many Slot machine establishments allow players to eat, drink or smoke while playing game. This adds to player's sense of enjoyment and freedom without having to worry about what other players are thinking or how they will react.

No pushing or shoving:

Unlike a game of Roulette where players often push and shove their way between other players in order to place a bet, one does not need to tolerate such behavior when playing Slots.

Real money:

While classic casino games are played with plastic casino chips, Slot machines are played with real money notes and coins, making gambling experience much more realistic for player.

Privacy:

Being a single player game, one is able to bet as much or as little on any game without knowledge of other persons. This is a significant advantage considering fact that one does not want to attract attention of any questionable characters by betting large amounts of money in open view of a group of people.

Given these set of facts, it is no wonder that Slot machines are one of most popular games in a casino, often generating approximately one third of total casino's income.