RFB (Room, Food, Beverage) is a term most often heard in brick-and-mortar casinos which refers to a type of complementary rewards (free rooms, meals and drinks) that a host of the casino provides to the most loyal players.
What is the point of RFB?
The main purpose of RFB programs is to retain the most loyal and wealthy clients of a casino. If an institution provides such an option, then VIP players have an opportunity to leave in a hotel, eat food and drink cocktails at no cost. Casino guarantees to absorb all the costs.
Such a privilege is only available to players who spend big sums of money and time in a certain casino. So casinos can take into account this option because it works as an effective marketing tool.