Customer story · Boutique fitness

How [solidcore] turned empty class seats into nearly 3,000 bookings with Growth Minded's Utilize module

Across its studio network, Utilize matches the right members and prospects to classes at risk of going unfilled, using the scheduling and marketing tools [solidcore] already runs.

Multi-studio rolloutL Catterton-backedExisting platformsNo migrationEngageOS + InsightsOS

At a glance

Results across the program.

Figures are rounded and slightly adjusted to protect client confidentiality.

Nearly 3,000 class bookings from matched sends in one month.

~$45K in estimated incremental revenue in the month, with auto-pay renewals excluded.

More than 2× the audience during the scale test, with booking rate up ~0.5 percentage points.

Members booked at roughly 18%, about 6× the traditional lapsed-member flow.

Estimated return of ~10× software cost in month one, including ~5× on one-off purchases alone.

The challenge

Reach was not the problem. Precision was.

[solidcore] runs Utilize across a growing studio network. Its traditional lapsed-member flow could not see which class actually had an empty seat. Its scheduling platform held the schedule and its marketing tools could deliver the messages; the missing piece was deciding whom to reach for each specific class before the seat expired.

The solution

The missing decision layer.

Utilize, an EngageOS module, watches the class schedule for seats unlikely to fill soon. It scores members and prospects on their likelihood to take a particular seat, then sends small, matched campaigns through [solidcore]'s existing marketing platform. Its scheduling platform stays the system of record. No migration, new email tool, or engineering lift.

Module results

What changed.

EngageOS module

Utilize

Fill seats that would otherwise go empty with small, matched sends.

Nearly 3,000 bookings from seat-specific sends.
Roughly 18% of members booked after a send.
Audience grew more than 2× while booking rate rose ~0.5 percentage points.

The path

Open seat

Matched guest

Booked class

EngageOS module

Convert

Bring unfinished signups back into the booking journey.

$20K+ recovered from abandoned signups in two weeks.
2× conversion versus a randomized control, while reaching fewer than half of drop-offs.
One-and-done rate fell ~3.5 points; early attendance improved ~12 points.

The path

Signup starts

Recovery send

Booking resumes

The scale test

More reach. Stronger yield.

Figures are rounded and slightly adjusted to protect client confidentiality.
Measure	Change
Delivered	~2.2×
Booked	~2.3×
Booking rate	+0.5 pp
Incremental yield per delivered send	+0.4 pp

Revenue impact from Utilize

~$45K in estimated incremental revenue during the month, excluding routine auto-pay membership renewals:

Figures are rounded and slightly adjusted to protect client confidentiality.

~$25K from one-off purchases: single classes, packages, and add-ons.
~$20K+ in first-month revenue from roughly 130 new or reactivated memberships that started within days of a send; a holdout test is evaluating causation.

Experiment findings

What the tests revealed.

Send ahead of class, not only on the morning of.
Recent visits predict response better than visit count; members without classes still book.
Who you reach matters more than how empty a studio is.
Utilize filled empty seats; layering in Convert recovered unfinished signups.

Architecture

A closed loop on the existing stack.

Step 1
Existing scheduling platform (system of record: appointments, memberships, check-ins, payments, cancellations, logged in real time)
Step 2
Utilize in EngageOS (spots classes unlikely to fill soon and matches each seat with members and prospects most likely to book it)
Step 3
Existing marketing platform (sends small, matched campaigns through the existing channel; no new email tool or engineering lift)
Step 4
Scheduling platform again, loop closed (the booking lands back in the system of record)

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