Google Calendar, like most products in G Suite, has lots of little features that are often overlooked. Just because those features are overlooked doesn't mean that they're not useful. For example, you can print a guest list from an event on any of your Google Calendars. In the video embedded below I demonstrate how to do that.
Applications for Education
As I mentioned in the video, having a printed guest list could be convenient for things like taking attendance at a meeting of an extracurricular club.