Catching the Quiet Quit: What Churn-Risk Scoring Looks Like for a 40-Year-Old Dojo

Ahn's Plano Tae Kwon Do has been in the same room in Plano, Texas since 1986 — the first Tae Kwon Do school the city had. Master Chun Ahn trained directly under his father, Grandmaster Ye Mo Ahn, who began teaching in Texas in 1968 after training under Grandmaster Hwang Kee, one of the founding figures of the art in Korea. That lineage is documented on the school's own site, not a claim anyone had to dig for.

None of that is the gap. A school with a forty-year run and a direct instructor lineage does not have a credibility problem. What it has is the same blind spot every subscription-style business runs into, whether the subscription is a dojo, a gym, or a SaaS product: attendance is data, but almost nobody is scoring it while it happens.

//The pattern that only shows up in hindsight

A student comes three times a week in January, twice in February, once in March. The tuition still clears — memberships are typically billed monthly, not per class — so nothing on the books moves until the cancellation request arrives. By then, whatever conversation might have kept that student happened six weeks too late, if it happened at all. Front-desk staff can often feel this drift from the floor. What they don't have is a system that writes it down and acts on it before the exit is final.

The intake side has the same shape. Ahn's currently routes new-student interest through a Google Form on its contact page, and the only price listed anywhere on the site is the $30 introductory offer — two twenty-minute semi-private lessons. A parent deciding on a Sunday night, after the kids are in bed, has no way to see a schedule or book a class in that moment. They fill in a form and wait for a callback.

//Why the blind spot is expensive, not just annoying

This isn't a hunch. Retention economics are among the most consistently measured numbers in subscription businesses, and two figures set the scale:

• +A 5-percentage-point increase in customer retention raises profit by 25% to 95% depending on the industry — Frederick Reichheld's Bain & Company research, summarised in the Harvard Business Review piece linked below.
• +The average health club loses 28.6% of its members a year, per the Health & Fitness Association's Profiles of Success research — roughly one in four members who start a year as a member won't be one by the end of it.
• +Acquiring a replacement customer costs on the order of five times what it costs to keep an existing one, which is why the first two numbers compound rather than simply add.

One caveat worth stating rather than glossing over: nothing published ties that 28.6% figure to martial arts schools specifically rather than gyms broadly, and Ahn's has not published a churn number of its own. The industry-wide pattern is well documented. This school's actual rate is not, and it is not guessed at here.

//What a churn-risk score actually does

The mechanism is straightforward, which is part of why it is both easy to build and easy to skip. A nightly job blends a handful of signals per student into a single risk score that moves them from green to amber to red before a cancellation is ever typed into a form:

• +Visit-frequency decay — this month's attendance against a rolling average, not a single missed class.
• +Days since last visit — a plain gap counter, weighted more heavily as it grows.
• +Plan-to-usage mismatch — someone on an unlimited plan attending once a month is a different risk than someone on a 4x plan attending four times.
• +Payment health — a declined card is itself a signal, independent of attendance.

What the score enables is specific, not generic. A student sliding from three visits a week to one doesn't need a blast discount email. They need a person to notice, and ideally an offer sized to where they actually are: a downgrade that keeps them enrolled at a lower tier rather than losing them entirely, or outreach aimed at the belt test they were closest to. The same system that catches the slow fade also handles the other side of intake — a way to see the schedule and reserve a spot at 9pm on a Sunday, instead of a form that waits until Monday.

//What's real here and what isn't

The facts above — the 1986 founding, the lineage, the Google Form, the $30 intro price — are published, current as of August 2026, and checkable on the school's own site. The dollar figures and dashboard numbers in DROP-007, which illustrate what a churn-risk system could surface for a school like this, are explicitly sample data rather than Ahn's real books, because Ahn's real tuition and attendance patterns aren't published anywhere. Anyone building this for real should expect the actual numbers to look different and correct the model accordingly.

//Sources

• +The Value of Keeping the Right Customers — Harvard Business Review: https://hbr.org/2014/10/the-value-of-keeping-the-right-customers
• +Why Health Club Retention Requires a Technology Solution — Health & Fitness Association: https://www.healthandfitness.org/why-health-club-retention-requires-a-technology-solution/
• +Ahn's Plano Tae Kwon Do, official site: https://www.ahns-tkd.com/
• +DROP-007, the system this post describes: https://noumansadiq.com/drops/drop-007-ahns-plano-tae-kwon-do/