Duo training and subscriptions for 2 people
Short answer: no. A membership or booking allowing one member to book a place for two people (duo training or a "subscription for 2 people") does not exist yet, but work is underway. A class's group size is the total number of places; each member books one place themselves.
How to configure duo training currently
Each participant receives their own package or credits (recommended). If desired, create a duo package per person, for example at half price. Duplicate the class type, set group size to 2 and select it under the package's bookable classes. Each duo session then deducts one credit from both people. Each member books their own place.
Schedule the session yourself as a coach. Schedule the class in the calendar and add both members under Clients.
One shared account. Create one account for both people (for example "Jan & Wilma") with one membership and one place in the class. They divide the cost themselves.
Want duo membership added as a feature? Submit it on the Wishlist.
Duplicating a class type with group size 2
Go to Calendar → three dots (⋯) → Edit / add classes.
Duplicate the PT class type or create a new one, for example "Duo PT".
Set the Group size to 2.
Link the class type to the correct services in Finance → Offerings and save.