Hi Eoin,
Thanks for reaching out! At the moment, we do not currently offer any way to group sub-events under a larger event for ticketing purposes. I’d suggest creating a single event (spanning multiple days, if needed) and listing the details for each sub-event in the event’s description–this way, ticketing can be handled through a single master event, while the information on each event in the series is still available to your visitors.
If you’re interested in seeing this functionality fully implemented into a future version of The Events Calendar or Events Calendar PRO, you can submit your feature ideas (or vote on an existing suggestion) over on our UserVoice forums! Please don’t hesitate to drop by and cast your ballot–we’d love the opportunity to discuss your ideas further! 🙂
Thank you!