Hi,
Yes, you can use the Event template with Eventbrite, the template event page is a default K2 item. If you want to add Buy tickets button try to add the following code into Extra Field:
<a href="https://www.eventbrite.com/e/events-template-release-party-tickets-12133905839?ref=ebtnebtckt" target="_blank"><img src="https://www.eventbrite.com/custombutton?eid=12133905839" alt="Eventbrite - Events Template Release Party" /></a>
You can also add the following iframe into k2 item content:
<iframe src="//eventbrite.com/tickets-external?eid=12133905839&ref=etckt" frameborder="0" height="214" width="100%" vspace="0" hspace="0" marginheight="5" marginwidth="5" scrolling="auto" allowtransparency="true"></iframe>
To display this. Tickets id etc. must be configured on the Eventbrite site.
Cheers
Joshua