At CORE40, fitness is our vehicle for personal transformation. We aspire to help you live an elevated life experience that is genuine, supportive, and heart-centered. We are committed to seeing you through your fitness journey, and celebrating you as you achieve improvement in every aspect of your life.

1390 Larkin Street San Francisco, CA 94109 Mon - Sat 8.00 - 18.00, Sunday 7.00 - 20.00
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Terms & Conditions


  • Unlimited monthly packages include up to 1 class per day. Additional classes on the same day will be charged to the credit card on file at $20 per class.
  • Recurring memberships automatically renew after completion of the initial commitment. Email us at to change or cancel your recurring membership, after the initial commitment has been met and with at least 10 days before your next scheduled payment. In the event of cancellation before the initial commitment has been met, you will pay the difference between the full priced package and the discounted contract package for the number of completed payments made under the contract at time of early cancellation. See recurring membership contract language for more details.
  • You can freeze your monthly recurring package for a fee of $25 for suspensions over 10 days. Please email at least 7 days before the date you want to have your package suspended.
  • For the 1-Year Unlimited Prepaid package, a maximum of two suspensions are allowed, for a fee of $25 for each suspensions placed. The 6-Mo Unlimited Prepaid package, one suspension is allowed for a fee of $25.
  • Instructors are subject to change without notice. Please visit the CORE40 schedule for details.
  • CORE40 accepts Visa, Mastercard, American Express, or debit.
  • All sales are final. Classes are non-refundable. However, your package can be transferred to another client.
  • It is recommended that clients wear grip socks during class. These are available in studio for purchase.
  • The studio opens 15 minutes before class. First time clients must arrive no later than 10 minutes before class for a safety orientation on the Megaformer.
  • Machines may be released to clients on standby at the start of class. If you are late and your reserved space is given to a drop-in client, we will not charge you and you will keep your session purchased through CORE40, to use another time. If you are on a VIP Unlimited Package, please email us at so that you will not be charged a no-show fee. Please note this does not apply to Classpass reservations.


  • Need to cancel a session? Don’t sweat it! Due to our small class size we have a 12-hour cancellation policy. This means you can cancel your class up to 12 hours before the class start time and the class will be re-credited to your account for future use. If you signed up via Classpass, your credits will go back to your CP account.
  • Classes cancelled after the 12-hour window, will be considered late cancellations. Session clients will lose that session, and unlimited members will be charged a $15 fee for late cancellations and $25 for no shows. The charge typically occurs 7-14 days after the cancellation/no show.
  • BOOKED AT THE WRONG STUDIO / TIME? You may drop into class at a different studio or a different class time, if there is room, but you will be charged the applicable late cancellation/no show fee for your original reservation. If you are a ClassPass client, you will have to purchase a CORE40 drop-in session if you want to attend a different class than the one you booked. Please email with any questions.
  • The intro offers; First Class and Intro Month are valid one per client only.
  • To cancel your class reservation, log into your account, go to “My Info”, click “My Schedule”, and click Cancel next to the class time.


  • If the class you want to attend is full, join the waitlist. To join the waitlist you must have a class credit in your account.
  • If a spot opens up, you will be notified by email. To receive these reminders, your  profile must be set to accept notifications and reminders.
  • You can remove yourself from the waitlist up to 12 hours before the class starts. Once inside the 12-hour window before class, no further clients will be pulled from the waitlist. Please be sure to remove yourself from the waitlist if you no longer plan on joining the class — if you are pulled off the waitlist and don’t show up for class, you will lose that session, or be charged a $25 no show fee if you are an unlimited member.
  • To check your waitlist status, log in to your account, go to “My Info”, click “My Schedule”. If you got into the class it will say “Waitlist Unconfirmed”. If you do not want this class, be sure to remove yourself so you don’t get charged.


Forgot a personal item? Visit the studio’s lost & found to check for it. Please note that CORE40 is not responsible for any personal belongings at the studio. Forgotten items will be periodically donated to community organizations. We cannot guarantee your items will be held at the studio for any length of time, so please pick up forgotten belongings ASAP.