ONYX RIVER NORTH

Onyx River North, on the Near North Side, is a Pilates studio known for heated reformer classes, and reviewers also mention a Hyrox-style class and outdoor sessions on the lakefront. Visitors and first-timers praise the spacious, clean studio with lockers, a place to freshen up and showers, plus friendly staff, good music and instructors who walk novices through the machines and offer modifications. Many reviewers call it their favourite Pilates studio in Chicago and say classes are challenging yet supportive. There are also sharp criticisms: one reviewer found the reformers too small for tall people and the heat hindering, another said several machines broke during a class, and a third had billing problems after cancelling a membership.

• Heated reformer classes
• Spacious, clean studio with showers
• Friendly staff and welcoming atmosphere
• Instructors guide novices and offer modifications
• Good music

• Reformers small for tall people
• Equipment breakdown in one class
• Billing problems after cancelling

• Veronica N.October 2026

  Just took my second class at Onyx today; one of them being the new Hyrox class…all I can say is wow! What a great workout experience both of the classes were! Super friendly staff, coaches (S/O Luke & Care), and all around community…cannot recommend enough! You’ve got to give it a try!

• Jenn S.September 2026

  My friend and I were visiting Chicago & we enjoy working out together. This was the first heated reformer class we’ve ever seen and taken…1,000,000/10! The studio was spacious, clean, had lockers, 2 spaces to freshen up, & SHOWERS! The material & shape of the reformers were unique, I Had a good grip with everything despite the heat and sweat which I loved! The class itself was also amazing, The music was great too! If I lived in Chicago I would 100% be apart of the Oynx community.

• Emily B.August 2026

  I bought a first time class pack to try this place out. The reformers are too small if you're tall, the classes didn't have great flows with the exception of 1-2 classes I liked with Allie and Megan. I brought friends with me to 2 classes and they felt the same. The heat feels unnecessary and hindering of the workout itself. The app said to cancel before class starts to avoid a no-show fee, I canceled my last class the night before and was charged a $10 late cancelation fee. I reached out to them and they would not refund me for this, even though the app had incorrect information and it was my first time. Also, the first time pack expires, so be careful when booking so you don't lose out on more $$,

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