Recently I read that Hawaiian organized crime is still very active, largely in places like Waianae and Puna. It's definitely something more akin to the "Dixie mafia" in the Gulf Coast and the southern Appalachians and Ozarks as well as the "Cajun mafia" in rural Louisiana. Not anything as large scale as Cosa Nostra, but definitely local mob-like groups that get involved in local politics and run a number of rackets.

Gambling is a huge thing, but they also exploit tourist things like local lava flow tours. They apparently got a stranglehold over that kind of stuff and anyone else trying to step in on these kind of tourist attractions gets chased off. Allegedly there have been more than a few disappearances and even murders of those who were stubborn and refused to leave.