You'll see all different types of gamblers in a casino. There are high rollers and low rollers, slot fanatics and table game aficionados. Some play for a few minutes at a time. Others settle in for the duration and play for hours on end. While casinos appreciate the people who come through their doors and spend money on their machines and their tables, they have a special affection for a certain type of gambler. What's more, they reward these gamblers for being the way they are.