Displaying posts that include a particular value for an ACF field (meta_key).
$posts = get_posts(array(
'numberposts' => -1,
'post_type' => 'event',
'meta_key' => 'location',
'meta_value' => 'melbourne'
));
if($posts) {
echo '<ul>';
foreach($posts as $post) {
echo '<li><a href="'.get_permalink($post->ID).'">'.get_the_title($post->ID).'</a></li>';
}
echo '</ul>';
}