Special events or group lessons that require different pricing can be accommodated with per-person fees. With group lessons, you can track attendance and charges separately. To create a group event...
Go the calendar and click on the day for your event, then select Group Lesson from the list
Choose your students, and set the date and time of your event (and if it repeats)
Further down, choose Set a different rate per student for this lesson and fill out what the custom price will be for each student.
Then fill in the rest of the details (Event Title, Location, Category and Duration), and click the green Create New Lesson button
After the event has passed you can go into the Attendance area of the calendar and individually set the attendance for each participant.