In the sprawl of Los Angeles County, a handful of casinos have operated for decades.

There’s the crescent-shaped casino in Commerce, an industrial city off Interstate 5. A warehouse-like gambling parlor in Hawaiian Gardens, a short drive south. Two card rooms in Gardena, a nearby suburb.

Beyond being places to gamble and unwind, they have two things in common. They generate a large portion of their cities’ revenue. And their existence may soon be challenged in court by California’s tribal nations.