How much does SMS consent matter when a gym texts its class waitlist?

A waitlist alert a member asked for is different from a marketing blast, but the consent rules still apply. Here is what to collect, what to say, and how to keep messages deliverable.

Julien Jimenez

September 7, 2026 · 4 min read

In the United States, the Telephone Consumer Protection Act regulates automated calls and texts to mobile numbers, and many states add their own rules on top. A waitlist offer is informational, the member asked to be told when a spot opens, which generally places it in a different category than promotional messages. That does not make it exempt. You still need the member's consent to text them at all, you still need to honor opt-outs promptly, and you still need to be able to show when and how that consent was given. None of this is legal advice; it is the shape of the problem, and a conversation with counsel is money well spent.

Beyond the law sit the carriers. Business texting in the US through application-to-person routes generally requires registering your brand and your messaging use case, a process commonly called 10DLC registration. Unregistered or poorly described traffic gets filtered, which for a studio means offers that never arrive and spots that stay empty. Your SMS provider handles the mechanics, but you supply the description of what you send and how people opted in. A clean consent flow is therefore both a compliance asset and a deliverability asset.

Keep reading: Why Late Cancellations Quietly Cost Your Studio, Turning a Waitlist Into Filled Classes, The Etiquette of Class Cancellations. See how SeatMend helps you fills studio and gym class cancellations from the waitlist by sms.

Collect consent at sign-up with a clear, unchecked-by-default box or an explicit yes, worded along these lines: I agree to receive text messages from the studio about my class bookings and waitlist offers. Message frequency varies. Message and data rates may apply. Reply STOP to opt out and HELP for help. Keep a record of the timestamp, the phone number, and the method (web form, in-person form, app setting). Keep marketing consent separate from booking and waitlist consent, because a member may want spot alerts and nothing else. Related: Why Late Cancellations Quietly Cost Your Studio

For existing members with no record, do not assume. Send one confirmation text asking them to reply YES to keep receiving waitlist alerts, or collect the consent on their next visit. Document everything, including who at the desk collected it. If a complaint ever arrives, the consent record is your defense, and a record that says a staff member added the number in 2024 without a signature is not much of a defense. The effort is a few hours once and a few seconds per new member afterward.

Message hygiene: STOP, HELP, and what you may send

Every automated texting program must honor STOP and its common variants immediately and reply with a short confirmation that the member has been unsubscribed. HELP should return the studio name and a way to reach you. Include the studio name in every message so the recipient knows who is texting. Keep waitlist texts strictly about the spot. Adding a line about a new smoothie or a merchandise sale converts an informational message into a marketing one, which carries a higher consent bar and invites exactly the complaints you are trying to avoid. Related: Turning a Waitlist Into Filled Classes

Send within reasonable hours and keep frequency modest, one text per spot and a small daily cap. When a member opts out of waitlist texts, remove them from SMS lists and fall back to email or app notifications, then tell them at the desk what they are missing so they can opt back in deliberately. Rejoining should require a fresh, explicit opt-in from the member, by texting a start keyword or re-checking the box, not a staff toggle. That rule protects the studio and respects the member in the same motion.

A simple compliance checklist for a small studio

A workable checklist fits on an index card: explicit opt-in captured with a timestamp and method; marketing consent held separately from booking and waitlist consent; STOP and HELP handled automatically; the studio name in every message; quiet hours enforced; carrier registration completed through your provider; a written SMS policy linked from your terms; a way to export consent records on request; and a yearly review with counsel or a compliance-aware advisor. Most of these items are set once and then simply maintained. Related: The Etiquette of Class Cancellations

The cost of doing this properly is small. The cost of skipping it ranges from filtered messages and empty spots to formal complaints and legal exposure. SeatMend captures opt-in, handles STOP and HELP, and applies quiet hours by default, but the studio still owns the consent language and the decision to keep promotions out of the waitlist channel. Whatever tool you use, ask the vendor to show you exactly where consent records live and how you would export them. If they cannot answer quickly, that is an answer too. Related: Filling Last Minute Spots Fairly

Key takeaways

Waitlist alerts are informational, but you still need explicit consent to text a member and must honor STOP immediately.
Capture opt-in with a timestamp and method, and keep marketing consent separate from booking and waitlist consent.
Keep waitlist texts strictly about the spot, include the studio name, and never mix in promotions.
Register your business texting through your provider, since unregistered traffic is often filtered and spots go unfilled.

Written by

Julien Jimenez

Julien Jimenez is an independent software builder based in Paris. He designs, ships, and operates focused SaaS products for small businesses and independent professionals. Read the full author page.