When setting up Bookings, it is good to understand that you will have the ability to create Booking URLs (simply a link or an iFrame/embed code) for the entire company, for an entire workspace, for a specific service, or for a specific user.
Therefore, if a user is assigned to multiple services across 2 different workspaces, if a client was accessing a workspace Bookings link, they would only see the services for that user that form part of that workspace.
Conversely, if someone accessed a URL for a specific user, they would see all services for that user across different workspaces, but not the availability or services of other users.