Hi Mike!
Thanks for your interest in our plugins 🙂
Recurring event functionality currently works that way under the hood (there is a parent event, then each subsequent event is a child post). However, that’s an implementation detail and it may not always work quite that way.
If you mean in more general terms, can you basically nest sub-events under a single main event, I’m afraid the answer is no: we don’t currently support this.
Our plugins are built with extensibility in mind, though, so it could very well be the case that you could build something like this as a custom feature.
I hope that answers your question, but do let me know if there are any other details you might need.