Jarred wanted custom permalinks for his events.

custom_permalinks.php

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

add_filter( 'post_type_link', 'jarred_show_ee_taxonomy_terms_in_permalinks', 1, 2 );
function jarred_show_ee_taxonomy_terms_in_permalinks( $post_link, $post ){
    if ( is_object( $post ) && $post->post_type == 'espresso_events' ){
        $terms = wp_get_object_terms( $post->ID, 'espresso_event_categories' );
        if( $terms && is_array($terms)){
            return str_replace( 'events/%espresso_event_categories%', 'events/' . $terms[0]->slug , $post_link );
        } else {
	    return str_replace( 'events/%espresso_event_categories%', 'events/uncategorized', $post_link );
	}
    }
    return $post_link;
}

add_filter( 'FHEE__EE_Register_CPTs__register_CPT__rewrite', 'jarred_custom_events_slug', 10, 2 );
function jarred_custom_events_slug( $slug, $post_type ) {
    if ( $post_type != 'espresso_events' ) {
        return $slug;
    }
    if ( $post_type == 'espresso_events' ) {
        $slug = array( 'slug' => 'events/%espresso_event_categories%', 'with_front' => false );
        return $slug;
    }
    return $slug;
}

add_filter( 'FHEE__EE_Register_CPTs__get_CPTs__cpts', 'jarred_modify_event_espresso_cpt_archive_url' );
function jarred_modify_event_espresso_cpt_archive_url( $cpt_registry_array ) {
    if ( isset( $cpt_registry_array['espresso_events'] ) ) {
        $cpt_registry_array['espresso_events']['args']['has_archive'] = 'events';
    }
    return $cpt_registry_array;
}