Hi @SC!
Thanks for reaching out to us!
We have a great article on how to customize template files here > https://theeventscalendar.com/knowledgebase/themers-guide/
I would suggest starting by checking out the single-event.php template file located in > /wp-content/plugins/the-events-calendar/src/views/
But if you want to modify the venue information then I think you might want to customize the single-venue.php template file located in > /wp-content/plugins/events-calendar-pro/src/views/pro/
I hope this helps. Let me know if you have any other questions and I’ll be happy to help.
Best!
Victor