RFB is a term most often heard in brick-and-mortar casinos. It is used to refer to complementary rewards casinos give to their VIP players. The abbreviation stands for Room, Food, and Beverages, which is precisely what one would expect to receive if they were offered RFB by a casino.
As is the case with other comp rewards, such as junkets, for example, casinos use them to reward their most loyal players, as well as big spenders. Naturally, there might be a few differences between the rewards, as RFB can vary from one casino to another.
While the term is mostly used by land-based casino players, you shouldn’t be surprised if you hear someone using it to refer to rewards offered by an online casino since most modern-day online casinos include loyalty programmes and offer various rewards in a slightly different form.