Changes Event Espresso venues sort order to order by title (name). Also, removes pagination for venue post type archives.

venue_change_archive_order_example.php

<?php
//* Please do NOT include the opening php tag, except of course if you're starting with a blank file

add_filter('pre_get_posts', 'order_venue_archive_by_title');
function order_venue_archive_by_title($query) {
    if ( $query->is_archive &&
        isset($query->query['post_type']) && 
        $query->query['post_type']== 'espresso_venues' )
    {
        $query->set('orderby', 'title');
        $query->set('order', 'ASC');
        // remove pagination
        $query->set('posts_per_page', -1);
    }
    return $query;
}