Event Registration
The record for registration and attendance is available for you in the event settings page in Events & Recordings.
Click on the event name for your event to go to the event settings. You'll see a link for the attendance, and that will download the .csv file. If you have event registration turned on and send people to the event page early to sign up, you'll see them listed here too.
The steps to the file are: Menu > Events & Recordings > Event-Name > Attendance.