The blue lights are coming to Palmer Square. [solidcore] Princeton opens at 45 Hulfish Street, across Nassau Street from Princeton University campus with a limited class schedule on November 18th. Grand opening events to follow in January 2026.
New to [solidcore]? Our coach-led, 50-minute classes use slow, controlled resistance training on our custom reformer-inspired machine to take your muscles all the way to failure. It's boutique fitness built around one goal: creating the strongest version of you.
Book your first class at Princeton.
You'll find us at 45 Hulfish Street Princeton, NJ 08542 on Palmer Square, a block off Nassau Street and directly across from the university. Good company on the Square: Alo, maman and Rhone are all within a short walk, and the Nassau Inn has been on the other side of the green since long before any of us.
There are two parking garages near our studio. The closest parking garage is at Palmer Square Chambers Street garage which is located across the street from the studio. Palmer Square Hulfish Street garage is a short walk down Hulfish St. There is also limited metered street parking available within Palmer Square.
You don't have to live in town for this to be your studio. West Windsor, Princeton Junction, Plainsboro, Lawrenceville, Hopewell, Pennington, Montgomery, Skillman, Rocky Hill, Kingston, and Cranbury are all a short drive in.
New to [solidcore]? Start with a Starter50 class.
Walk out our door, cross Nassau Street, and you're on campus. Princeton University sits directly opposite Palmer Square, roughly a two minute walk from the machine you'll be on. Nassau Street is meant to be the line between the town and the university, and it has never really worked. The Institute for Advanced Study is a mile south, and Princeton Day, Hun, and Stuart are a short drive out. A lot of this town keeps an academic calendar.
The rest of it keeps a train schedule. Princeton Junction runs to Penn Station all morning and the Dinky covers the last five minutes. When the day starts on a platform, 50 minutes is often the only window there is. That's the one we take.
Princeton respects work done slowly and done well. So does our method. It works on your body, and it works on your mind. (Training for a race? Start with Run Stronger: how [solidcore] builds the strength behind every stride.) And whatever stage you're training through (pregnancy ⋅ postpartum ⋅ coming back from an injury), our coaches will meet you where you are.
Essence Grigsby leads the Princeton team as Head Coach and Community Manager. Essence started as a fitness professional in Hamilton, NJ around 8 years ago. Her background includes kickboxing and classical pilates. Her journey with [solidcore] began in Philadelphia as a part time coach, where she soon became the Head Coach and Community Manager for the Wilmington, DE location. She has recently made her way back to central Jersey and is looking forward to bringing [solidcore] to Princeton’s vibrant community.
Never taken [solidcore] before? Book a Starter50, our beginner-focused format that breaks down the machine and the movements at a slower pace. Here's the full guide to choosing your first class. Fair warning: your muscles will shake. That's not a bug. It's the whole point, and here's the science behind it. Once you're hooked, here's how often to come back.
New to [solidcore]? Start with a Starter50.
Click here to find the current class schedule, membership options, and any intro offers!
Founding member rates are available for a limited time. Details on the studio page.
Book your first class at [solidcore] Princeton!
Where is [solidcore] Princeton?
➜ 45 Hulfish Street, Princeton, NJ 08542, on Palmer Square, a block off Nassau Street and about a two minute walk from Princeton University.
Is [solidcore] Princeton open?
➜ Yes, doors open November 18th, 2026, with grand opening events following on January 30th, 2027
Is there parking?
➜ Yes. The Palmer Square Chambers Street garage is directly across the street, and there’s metered street parking around Palmer Square.
How big are classes at [solidcore] Princeton?
➜ 14 machines, one per person.
How close is [solidcore] Princeton to Princeton University?
➜ About a two minute walk. We’re at 45 Hulfish Street on Palmer Square, directly across Nassau Street from campus, so students, faculty and staff can get here and back inside a class hour.
Is there a discount for students at [solidcore] Princeton?
➜ Yes. We offer a discount for students, military, teachers, and healthcare workers. Verify your eligibility here.
I live in West Windsor, Lawrenceville, or Plainsboro. Is this my studio?
➜ It is. We're on Palmer Square in downtown Princeton, and we serve West Windsor, Princeton Junction, Plainsboro, Lawrenceville, Hopewell, Pennington, Montgomery, Skillman, Rocky Hill, Kingston, and Cranbury.
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