Follow the queen is a variation of seven card stud. The queen is a wild card at all times. When a queen is dealt as an up card, the very next card is the second wild card. If another queen comes up, the second wild card changes to the next card. If no queen comes up or a queen is the last up card, then there is no second wild card.
A variation is to charge an fixed ante to be paid by a player when he is dealt an up wild card.