GOLD

GOLD is a fitness club, and a dungeon in the Persona 2 dualogy.

Persona 2: Eternal Punishment
The team heads into GOLD to look for Ulala Serizawa, which is turning into JOKER due to the Joker Curse that she has done. However, other members of the club tell them that Ulala has locked herself in the boxing area of the club, and another member in the upper floors has the key. It is later revelaed by a young girl that the man with the key is called Mike, and would be in the women's dressing room in the third floor.

Upon entering the boxing gym, Ulala reveals that it wasn't Youichi Makimura that she she wanted to kill, but Maya Amano instead. A battle follows, and, afterwards, Ulala explains that she cursed Maya while she was drunk, due to an inferiority complex she has. It shold be noted that, if the player picks the wrong choice at this point, Maia will never be able to mutate into Maia Custom.

Ulala is the taken into the Velvet Room, where Igor seals the Joker persona away. However, he explains that it's up to Ulala to keep it sealed.

Persona 2: Eternal Punishment

 * 1F: Item/Clean Salt, Material/Rainbow Gleam
 * 3F: Tarot/Free Card (x5), Event/Gym Key

Resource
Treasure and enemy info for Eternal Punishment from FAQ/Walkthrough by Yushiro