In 'Schedule' or 'Calendar' tab, select the session of your choice.

Step 1: Click on 'Manage bookings'.

Step 2: Search for the member in the search bar.

Click on 'Book In'.

Step 3: Select a valid pass that the member possesses or invoice a new one using the 'Bill a new pass' tab.

If you want to book the client on multiple sessions, you can do so by clicking on the black calendar :