WooCommerce Memberships restriction on a page through using a template. This is how we can easily do it for pages that aren't generated through a post, like the Events Calendar archive

restrict.php

<?php
  $user_id = get_current_user_id();
    if ( wc_memberships_is_user_active_member( $user_id, 'gold' ) ) {
      get_template_part( 'template', 'gold' );
    } else {
      echo "You are not allowed to view this content";
    }
?>