Show User Role on Events > Bookings (need no-user booking mode Off)

<?php

/*
 * paste in your theme functions.php
 * after adding in your functions.php, go to Events > Bookings > Recent Bookings or by clicking an specific
 * click on the Gear icon and drag&drop field "Booked Name"
 */

function my_em_bookings_table_cols_template_booked_name($template, $EM_Bookings_Table){
    $template['user_role'] = 'User Role';
    return $template;
}
add_action('em_bookings_table_cols_template', 'my_em_bookings_table_cols_template_booked_name',10,2);

function my_em_custom_booking_form_cols_booked_name($replace, $col, $EM_Booking, $EM_Bookings_Table, $csv){
    if( $col == 'user_role' ){
		$EM_Person  = $EM_Booking->get_person();
		$user_meta  = get_userdata($EM_Person->ID);
        $user_roles = $user_meta->roles;
		$replace = implode(',', $user_roles);
    }
    return $replace;
}
add_filter('em_bookings_table_rows_col','my_em_custom_booking_form_cols_booked_name', 10, 5);