Example of how to exclude specific event ID's from the front end event lists.

example.php

<?php //Please do not include the opening PHP tag if you already have one

function tw_ee_exclude_events_from_front_end($wp_query) {
    if( is_admin() ){
        return;
    }

    if ( isset( $wp_query->query_vars['post_type'] ) 
        && ( $wp_query->query_vars['post_type'] == 'espresso_events' || ( is_array( $wp_query->query_vars['post_type'] ) && in_array( 'espresso_events', $wp_query->query_vars['post_type'] ) ) ) 
        && ! $wp_query->is_singular 
    ) {
        $wp_query->set('post__not_in', array(58, 11, 1911));
    }
}
add_action('pre_get_posts', 'tw_ee_exclude_events_from_front_end');