I joined KX in Brompton Cross with a mixture of curiosity and quiet expectation. You hear about it in that particular London way, not advertised, but mentioned in passing, as if it’s less a place and more a tier of life. Someone you know goes there. Someone else swears by it. The details are always vague, except for one thing: it’s expensive.

What no one quite tells you (at least not upfront) is just how expensive.

The first thing that strikes you is the calm. Not the curated, Instagrammable calm of most wellness spaces, but something more deliberate. Controlled. There’s no chaos, no waiting for machines, no low-level tension of a crowded gym floor. It feels almost like a private clinic disguised as a members’ club. You’re there to work, to reset, to improve.

And, to be fair, it delivers. The facilities are exceptional, a gym that never feels overrun, a spa that rivals a five-star hotel, and a restaurant that makes “healthy eating” feel like an indulgence rather than a compromise. Everything you need is in one place, and it works seamlessly. That is the real luxury: not marble surfaces or eucalyptus steam rooms, but the absence of friction.

But then, gradually, the numbers start to come into focus.

Membership itself is not publicly listed, but the range hovers between £700 and £1000 per month, we paid a joining fee on top. My girlfriend and I joined separately which was fine but it ended up costing us about £1600 a month each. That alone places it firmly in a different category to even London’s premium gyms. And yet, that figure is only the beginning.

Because KX is designed in such a way that simply “having membership” is almost beside the point.

Personal training, which feels less like an optional extra and more like part of the ecosystem — can easily run £100 to £150 per session. Do that a couple of times a week and you’re quietly adding another £800 to £1,200 a month. Treatments, testing, recovery sessions: all available, all excellent, all additional.

Even the smaller things begin to accumulate. Lunch isn’t included, though it sits there, conveniently, persuasively. You finish a workout, you’re already in the mindset, and ordering something clean and perfectly calibrated feels like the logical next step. A salad, a juice, a coffee, £20 here, £30 there, and before long, it’s simply part of your routine.

The club even operates an internal account system, meaning you rarely feel the moment of payment. You just sign, and it’s handled later. It’s frictionless in every sense.

Which is precisely the point.

There is also the matter of commitment. Membership is typically structured annually, and once you are in, you are in. There is no casual pause, no dipping in and out depending on your schedule. Even if you stop going, the cost continues; a quiet, persistent reminder.

The reality of cancelling KX, you are effectively locked in for 12 months.

Once you’ve joined on a standard membership you cannot cancel during the 12-month term

Even if: you stop going, your schedule changes, you simply change your mind, even if you have a death in the family and your financial circumstances dramatically change.

This is explicitly stated in their terms. It’s not a flexible membership. It’s a contract.

And so a subtle shift occurs. What begins as a luxury starts to feel like something you must justify. You find yourself going not just because you want to, but because you feel you should.

And yet, for all of this, it is undeniably effective. If you can absorb the cost, and that is the defining condition, it removes every barrier to living well. Training, recovery, nutrition, expertise: all handled, all available, all under one roof. It becomes less a gym and more an infrastructure for a certain kind of life.

But it is a life that comes at a price.

In truth, KX is not really for the “well-off.” It is for the genuinely wealthy, those for whom a four-figure monthly spend on wellbeing does not require negotiation or second thought. Luxury and the beautiful people everywhere you turn.

For everyone else, it sits in a more complicated space: aspirational, impressive, but ultimately difficult to sustain without a lingering sense of excess.

I found myself admiring it, even as I questioned it. It is, without doubt, one of the most refined wellness environments in London. But it is also a place where every decision, every session, every meal, every small indulgence; carries a cost.

And those costs, however quietly presented, have a way of adding up.

Truth is I love it but cannot really afford it. And getting out of your contract once you’ve committed isn’t possible either. Buyer beware, this club will draw you in like a super powerful James Bond style magnet but once you’re in you’re in.