Genie Lounge is a dual treasure type Monster Room introduced in Boss Monster: The Next Level
This card is best kept in the hand until the player wishes to gain access to the Spell Deck while they have no Spells. Building this card while the player has a Spell card in their hand will waste the effect.
The dual treasure type of the card makes it easy for a player to build an Advanced Mage or Thief Room.
An excerpt from an update featuring Genie Lounge:
"Genie Lounge will grant you one wish ...if you really need it."