The Mariana Tek and ClassPass integration is enabled on a per-location basis. Let's say you have a location in San Diego and Washington, DC, you can enable the integration in San Diego and disable the integration in Washington, DC.
To enable the integration, log in as an Admin and go to Configuration > Locations > Edit Location by the needed location >Third Party Booking.
Once ClassPass is enabled in Mariana Tek, you will need to reach out to ClassPass and provide them with the following:
Organization ID (Tenant ID)
Location ID(s)
Date(s) that you'd like to launch your integration