A single's guide to Waikiki: What to do, where to go and what to invest in

Forget couples on honeymoon, hens parties and families packed into economy class. Waikiki can also be the ultimate solo holiday destination.

Whether you're keen to switch off the phone and email, or be a little more adventurous, the Hawaiian paradise offers a smorgasbord of activities that cater to varying budgets.

Here are my recommendations for things to do in Waikiki - the ultimate tourist hotspot - solo.

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Consider an adults-only hotel

After a kid-free zone? Romer House Waikiki is Oahu's first adults-only hotel. Nestled on lively Kuhio Avenue with its trendy hidden bars, it's a few blocks back from the beaches.

The backyard, with its jacuzzi-style pool and bar, has a relaxed vibe without the splash-zone distractions. It becomes an adult's playground with free weekly activities for hotel guests to enjoy including sunrise sound bath sessions, morning Pilates and yoga.

I enjoyed a glass of prosecco in the hotel bar before a bar-side tarot card reading. The hotel's resident tarot card reader, Reverend Moon Lavender, offers 15 or 30-minute sessions every Sunday from 6pm to 8pm by the bar.

Its sister venue, Romer Waikiki at the Ambassador, also has a similar weekly program, including astrology readings by the "Mayor of the Block", Ramona Sidlo.

Feeling lighter and a tad more positive about the future, I headed over to the hotel's restaurant, Izakaya 855-Aloha, for their Japanese-Hawaiian fusion dishes.

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Ride the wave... literally

If sipping on cocktails and lazing about by the pool is not your thing, Waikiki offers plenty of ways to break a sweat.

The Twin Fin Hotel, overlooking Waikiki's glistening shoreline and gentle waves, has just launched a surf school, helmed by nine-time Pipeline champion, Jamie O'Brien.

Although there are group sessions available, I took part in a private lesson and was given photos and video content of myself on the board to share with my friends back home.

If surfing is a little too adventurous, you could try stand-up paddle boarding or yoga on paddleboards. These activities are quick and easy to book on Airbnb under experiences.

Enjoy a scenic hike

The Diamond Head lookout is one of the most popular hiking spots on Oahu and sees around 3,000 visitors a day, according to Australian Hiker.

A moderately-difficult walk, the trail has an elevation gain of 560 feet (170 metres) and captures breathtaking panoramic views of the Waikiki skyline atop a dormant volcano.

For something more off-grid, the Pali Lookout, northeast of Downtown Honolulu, offers views of Kailua and Kaneoha Bay, and has a small trail that starts off the Pali Puka hike.

Dine out in style

Iconic establishments such as Duke's and The Cheesecake Factory are often packed to the brim with large groups and families.

The top hotels along the glistening Waikiki strip contain some of the most incredible restaurants from world-renowned chefs. And the views are just as memorable as Duke's.

I enjoyed an Italian meal at La Bettola at the Alohilani Resort and almost forgot I was dining alone with the restaurant's floor-to-ceiling fish tank capturing my attention.

La Bettola is by world-renowned chef Tsutomu Ochiai who has just launched his first and only restaurant outside of Japan.

Alohilani Resort, with its cosmopolitan vibe and stunning infinity pool, also offers group tennis sessions for guests and a daily complimentary happy hour for those with access to the Longboard Club.

Pamper yourself

Honolulu caters to wellness with many hotels quick to follow the latest on-trend treatments and services.

Uhiwai Spa at the Renaissance Honolulu Hotel & Spa, not only has massages and facials on its menu but also offers Himalayan salt saunas, steam rooms and cold plunge baths.

The hotel also offers a "Hi-uwai ceremony" - a traditional ocean cleansing ritual that consists of immersing oneself in the ocean and traditional Hawaiian chanting to purify one's mind, body and spirit and honour the ocean, land and heavens.

Relax at an IV lounge and med spa

Drip Hawaii at the Alohilani Resort is Waikiki's first IV lounge and med spa, offering state-of-the-art treatments to promote total body rejuvenation.

Ahead of my 10-hour flight back to Sydney, I treated myself to the "Alohilani Retreat" - a drip packed with a cocktail of vitamins and minerals to promote immunity and wellness.

An hour later, I felt more hydrated and energetic, yet relaxed.

The writer travelled to Waikiki at her own expense. Activities were organised by REM Public Relations and provided by the resorts.