
ONYX Gym & Fitness 24/7
A 24/7 Alexandria gym with a flawless 5.0 rating — round-the-clock training in Sydney's inner south.
Why it's worth checking out
ONYX Gym & Fitness 24/7 is a large Alexandria gym for people who want the flexibility to train around work, study or other commitments. The gym says it offers 24/7 access and an open layout designed to provide plenty of room to train, with convenient connections to Green Square, Zetland, Erskineville, Newtown and Sydney Airport. It is also rated 5.0 on Google from 429 reviews.
The equipment is a major focus. ONYX highlights a broad selection from brands including Atlantis, Prime, Eleiko, Hammer Strength and Watson, with plate-loaded and pin-loaded machines, cable stations, premium cardio equipment and a large turfed area for functional training. The mix is suited to bodybuilding, powerlifting, strength and conditioning, or general fitness, while the range of equipment gives experienced members plenty to explore.
There is a clear emphasis on community as well as training. ONYX describes an inclusive environment for people at different experience levels and fitness stages, supported by member events, brand pop-ups, sampling activations, giveaways and charity initiatives. Its personal training team includes coaches with backgrounds in bodybuilding and powerlifting, with individual programmes, technique guidance, accountability and ongoing support. Small-group classes cover HIIT, mobility training, and strength and conditioning, allowing coaches to give members more attention.
For recovery, the on-site RECOVER space offers private contrast therapy using infrared saunas and ice baths, with towel service and an introduction to the facilities before a session. It is available for athletes, regular gym-goers or anyone looking to add a dedicated recovery session to their routine. Overall, ONYX suits solo members who want a well-equipped 24/7 training space, people seeking structured coaching, and those who prefer the motivation of a supportive fitness community.
Reviewed by Iyan B.
Practical details
Opening hours
Closed- Monday
- Closed
- Tuesday
- Closed
- WednesdayToday
- Closed
- Thursday
- Closed
- Friday
- Closed
- Saturday
- Closed
- Sunday
- 00:00 – 23:59
Spot Score
- Reputation
- 98
- Popularity
- 80
- Information quality
- 30
- Category fit
- 70
- Freshness
- 30
Our independent editorial score — not a user rating.
Nearby venues

Hollis Park Cafe
$$Cafes in Newtown, Sydney.

END Of KING
$$Cafes in Newtown, Sydney.

One Another
$$Cafes in Newtown, Sydney.

Maeda Newtown
$$Cafes in Newtown, Sydney.
More gyms in Sydney

Ultimate Performance Personal Trainers Sydney
Personal training gym in The Rocks with a 5-star rating across 670 Google reviews.

GFitness Freshwater
Gyms in Manly, Sydney.

Housed Basketball Alexandria
Gyms in Alexandria, Sydney.

Wellness Pilates Zetland
Wellness in Alexandria, Sydney.



