public function is_member_of($table, $uid)
	{
		if (!in_array($table, array('applicants', 'members', 'managers', 'invitees')))
		{
			return false;
		}

		if (!is_numeric($uid))
		{
			$uid = User::oneByUsername($uid)->get('id');
		}

		return in_array($uid, $this->get($table));
	}