You can enable Memberships, but decide to manage yourself who is a member and who is not.
This is useful if you don't charge your customers a membership fee (ex. you only want to mark some customers as special, ex. 'internal' customers and 'external' customers), or if you already have membership payments managed outside Bookeo.
To set up memberships this way:
1. Click on Marketing>Memberships
2. Tick Enable memberships
3. In Enrollment, select the option Do not let people enroll. I will manually manage memberships
4. Click the Ok button to save
Once set up this way, you are in control of who is a member and who is not. You can manually assign membership status to a customer from the customer's profile.