Background
When you create an event, it could appear with ‘Add to Cart’ on the Collections page. Since this app only functions on the product page, for this collection, you would need to hide the Add to Cart button.
Instructions
Go to Shopify Themes > Customize
On that theme, on the top dropdown, select Collections. Select the relevant collection you need to edit
Hide the Quick Shop button
Click Save. Now when you see the Collection page with your event, the customer is prompted to click on that tile and then select the time on the product page.