1. Learn How to Play the Ukulele and Dance the Hula
The Royal Hawaiian Centre offers a slew of complimentary cultural enrichment programs, including ukulele and hula lessons every Tuesday and Thursday. You can also get pointers on Lomi Lomi (Hawaiian massage), take a lei making class, or catch some free entertainment twice a month, courtesy of the Royal Hawaiian Band.
2. Watch Fireworks
The Hilton Hawaiian Village puts on a fireworks show every Friday night at 7:45. The concrete pier in front of the Outrigger Reef on the Beach hotel is one of the best vantage points.
3. See a Movie
Since 2001 "Sunset on the Beach" has been showing movies on the beach in Waikiki. Movies used to be shown every weekend, but now screenings are more sporadic (you can find a schedule here). There are sometimes thousands of spectators, so show up early to get a good view of the screen.
4. Enjoy Some Artwork Under the Shade of Banyan Trees
Every Saturday and Sunday artists gather to hang their work on the wood fence that surrounds the Honolulu Zoo. They were almost kicked off in 2007, but thankfully they've been able to keep Art on the Zoo Fence going (the weekly event is now over 50 years old). A number of acclaimed local artists got their start selling paintings along the fence. Who knows, you might discover the next great Hawaiian artist!
5. Grab Some Local Vanilla Beans and Honey at the Farmers' Market
There are many farmers' markets in Honolulu, but the Kapi'olani Community College Saturday market is the granddaddy of them all. It is a true farmer's market in the sense that farmers and food producers are actually in attendance to talk about their products. It also boasts being the only Honolulu farmers' market "featuring all Hawaii grown and produced foods." A must-visit for any foodie.
6. Find Out the Price of Marlin in Hawaii
You've got to get up pretty early, it starts at 5:30am and runs to 9:30am, but The Honolulu Fish Auction is a spectacle worth losing sleep to see. It is the only fish auction between Tokyo and Maine, and it sells 25-28 million pounds of fish per year--that's 3% of the Pacific catch. You'll probably never see more fish in one place in your life!
7. See the View From the Aloha Tower
It's no longer the tallest structure in Hawaii, but this clock tower remains one of Honolulu's most famous landmarks. The only way to the top is via a small, vintage elevator. When you reach the pinnacle you're greeted with amazing views of downtown Honolulu. The observation deck is open daily from 9:30am to 5pm.
8. Watch Stingrays and Longnose Butterflyfish Swim Around a Massive Hotel Aquarium
280, 000 gallons and three stories tall--that's the size of the Oceanarium at the Pacific Beach Hotel. It holds over 400 fish comprising 70 different species. The best views are from the hotel restaurant, but you can actually jump in the tank yourself and do a little Snubaing if you like (it'll cost you money though).
9. See a Sailboat Race
Every Friday night the Hawaii Yacht Club has a weekly sunset race from Ala Wai Harbor to either Diamond Head or Honolulu Harbor. Show up at the volunteer-run sign-in table around 5pm and you might be lucky enough to talk your way onto a boat as a passenger.
10. Visit a Botanical Garden in a Tropical Rainforest
The University of Hawaii Lyon Arboretum and Botanical Garden is home to nine different gardens spread out over nearly 200 acres. The gardens of the arboretum house a collection of more than 5, 000 tropical plant species. Admission is by donation, which means you can get in free, but you'll probably agree it's worth paying the suggested $5 to wander through this stunning place.