Add author support for organizers/venues

add_action( 'init', 'add_author_support_orgs_venues' );

function add_author_support_orgs_venues() {
    if ( ! class_exists( 'TribeEvents' ) ) return;
    add_post_type_support( TribeEvents::VENUE_POST_TYPE, 'author' );
    add_post_type_support( TribeEvents::ORGANIZER_POST_TYPE, 'author' );
}