Make an Event Website a link instead of showing the text url. This version opens a new window with the additional target=blank code.

EventWebsiteLink2.php

<?php
add_filter( 'tribe_get_event_website_link_label', 'tribe_get_event_website_link_label_default' );

function tribe_get_event_website_link_label_default( $label ) {
	if ( $label === tribe_get_event_website_url() ) {
		$label = "Visit Website &raquo;";
	}

	return '<a href="' . tribe_get_event_website_url() . '" target="_blank">' . $label . '</a>';
}

This is outdated. I had to use this method to make the link open in a new window/tab:

add_filter( 'tribe_get_event_website_link_target', function() { return '_blank'; } );