Hi Steve,
Thanks for reaching out!
Unfortunately there is not currently any invite functionality built in to our plugins. I’m sorry for the bad news there! Depending on how you would like this to work, you may be able to use a third-party plugin to get something similar set up. I did a quick search and found Better Notifications for WordPress and WP Post Email Notification (I have not tested these out). Something like this may be able to at least get you sending out notifications when new events are created.
If this is a feature you’d like to see added in the future, please do let us know over in our Feature Ideas Forum. This is what we use to gauge user interest in new features and help guide future development efforts.
I’m sorry I don’t have a better answer for you at the moment, but please let me know if you have any other questions!
Thanks,
Jennifer