last time i checked the website it said use the discount code ue. However, this is the same code that universal studios uses for the stay and play package. This code is available to everyone with or without all access card.
The all access card only allows priority seating and tracking your spending . When you reach 200.00 dollars they give you a credit of 20.00 dollars to be used at hard rock.
If you are interested in receiving discounts for food or merchandise purchase the pin collector hardrock card. These discounts are available on this card.