Affinity Interactive, formerly known as Herbst Gaming and Affinity Gaming, is an American private casino and sports betting company based in Paradise, Nevada. It operates eight casinos in Nevada, Missouri, and Iowa, and publishes the Daily Racing Form.

The company traces its roots to 1987, when its predecessor was formed to service the slot machines at the Terrible Herbst gas stations. It was operated by brothers Ed, Tim, and Troy Herbst, whose father, Jerry Herbst, owned the gas stations. Their company later became a slot route operator, maintaining slot machines at other businesses such as taverns and laundromats.

The Herbsts opened their first casino, the Terrible's Town Casino in Pahrump, Nevada, in 1996. This was followed by Terrible's Town Casino and Bowl in Henderson, Nevada; Terrible's Lakeside Casino in Pahrump in 1999; and Terrible's Hotel and Casino (formerly the Continental Hotel and Casino) in 2000 near the Las Vegas Strip.

In 2000, the Herbsts' slot company, E-T-T Inc., doubled its size by acquiring the slot route operation of Jackpot Enterprises for $41 million, bringing it to a total of 6,000 machines under management.

In 2001, the Herbst brothers' gaming interests were reorganized as Herbst Gaming, Inc., in connection with a $170-million bond offering.

The company opened its fifth casino, Terrible's Searchlight Casino in Searchlight, Nevada, in 2002.

In 2003, Herbst became the largest slot route operator in Nevada by acquiring Anchor Coin and its 1,100 machines from International Game Technology for $61 million.

In 2005, Herbst expanded to the Midwest by acquiring three casinos in Missouri and Iowa from W.M. Grace Entertainment for $287 million.