AMEX's terms on site:
You will be entitled to two complimentary lounges visits each year you hold a valid Preferred Rewards Gold Card. These may be used by the primary Cardmember, or by the primary Cardmember and one guest. Once you have been approved for your American Express Preferred Rewards Gold Card, please allow up to 28 working days for your Priority Pass™ card to arrive in the post. In order to access Priority Pass lounges, the Cardmember must present a valid Priority Pass membership in his or her name, along with the boarding pass for same-day travel and government-issued ID. Subsequent years’ renewal Terms and Conditions are at the discretion of Priority Pass. For complete conditions of use visit prioritypass.com. Access to the Priority Pass lounges may be subject to availability or wait times. Please read the Priority Pass conditions of use for more information. You will agree to abide by the conditions of use as contained in the lounge listing. You also agree that lounges may charge lounge usage fees at the prevailing rate, and to your American Express Preferred Rewards Gold Card, for any lounge visits that exceed the two complimentary lounge visits per membership year. The lounge usage fees charged are at the discretion of Priority Pass and any changes to the lounge access fee will be advised by them.