You are welcome to partake in social gambling while in the Aloha States but only if you keep it out of the hotels, motels, bars, nightclubs or any other business establishment or public place. In other words, gamble at home, socially, out of sight of the tourists.
The law prohibits wagering on horses, dog races or aboard ships or in casinos of any kind and defines gambling as:

“...staking or risking something of value upon the outcome of a contest of chance or uncontrollable future contingent event in order to receive something of value.” Code section 712-1220 et seq

To define a contest of chance, it specifies:

“‘Contest of chance’ means any contest, game, gaming scheme, or gaming device in which the outcome depends in a material degree upon an element of chance, notwithstanding that skill of the contestants may also be a factor therein.”
The law even has a section on Bookmaking where it says:

“‘Bookmaking’ means advancing gambling activity by accepting bets from members of the public upon the outcomes of future contingent events.”

This, in essence, ensures that every possible form of gambling is covered comprehensively with no possibility of anyone misunderstanding Hawaiin laws. If the game has a “material degree upon an element of chance”, it is considered to be gambling. If the game you're playing requires skill, like darts and billiards, you are welcome to enjoy them while living or holidaying in Hawaii.

And in case there is any question around contracts or insurance policies, “gambling does not include bona fide business transactions valid under the law of contracts, including but not limited to contracts for the purchase or sale at a future date of securities or commodities, and agreements to compensate for loss caused by the happening of chance, including but not limited to contracts of indemnity or guaranty and life, health, or accident insurance.”

Very few states have laws this specific and detailed around enjoying games of chance. The government clearly takes gambling very seriously and it is unlikely that major change will take place in the near future.

Right now, it is not possible to get a licence to open or operate a casino in Hawaii. The reasoning is that people don't visit the island to gamble and the government considers this to be a closed book argument.

There is no legal form of live gambling allowed on the island. While home poker games are permitted, and bars can host poker tournaments, as long as there is no buy-in, it is recommended that you fly over to Vegas if you want to gamble.

There are no Hawaii casinos in the Aloha states and they don't even hold a lottery. Illegal gambling is a criminal offence, which could result in jail time. Depending on the type of gambling or amount wagered, punishment for participating in illegal gambling may change and can be especially severe if you are holding games or lotteries for personal profit.

Certain activities may constitute gambling even if they are not specifically mentioned by name. So, if there is any doubt about whether the game you're playing could be considered gambling, rather don't get involved.

The last thing you want to do while living or vacationing in the Aloha states is have to call a lawyer to defend you in a case where you have been accused of illegal gambling. A criminal record is not something to mess around with.

In a state where not even charitable bingo games are allowed, and, despite three attempts to overthrow the ban a few years ago, which all failed because the majority of Hawaii senate voted against it, you are advised to pick another destination if you want to gamble while living, working or holidaying in Hawaii.

You are most welcome to gamble offshore and the government has no issue with you gambling online in the comfort of your own home, but trying to secure a license to operate a gambling facility in Hawaii is a non-starter.

With a wealth of online options available and the fact that many online casinos operate well on mobile devices, all is not lost. Despite maintaining a 100% ban on gambling, Hawaiin law enforcement doesn't arrest, charge or prosecute anyone who plays online through offshore casinos for real money, as long as they don't operate betting businesses for profit.