From Bulbapedia, the community-driven Pokémon encyclopedia.
The Fire Club (Japanese: ファイアクラブ Fire Club) is a group of Trainers who use Fire-type Pokémon in the Pokémon Trading Card Game. It is led by Ken. The club is a Colosseum filled with torches.
In the games
Players who are able to beat Ken are awarded the Fire Medal and two booster packs. The Club Master will not battle the player until the player has collected 300 cards or more.
Jessica from the Fighting Club is found here after Michael (also from the Fighting Club) is defeated. Once Jessica is also defeated, she goes back to her club.
The player is able to find a promotional Slowpoke card hidden two tiles left of the bookcase in the west room. This card is only available if a Lad in this room mentions it, which requires the player to have at least 3 Master Medals and to give all their unused Energy cards (the Energy cards that are not currently in any of the player's decks) when the Lad asks for the first time.
If the player has at least 3 Master Medals, the Lad asks the player to give him all the player's unused Energy cards. The player needs to have at least 1 Energy card outside their decks to give him. If the player gives all the Energy cards the first time the Lad asks, then the Lad tells the player about the hidden card and then goes away. If the player refuses, the Lad goes away without mentioning the Slowpoke card, and this opportunity is permanently lost.
If the player doesn't have the required Master Medals in the first place, the Lad says "Come back and see me when you collect a lot of Energy cards!" However, the player is not actually required to have many Energy cards, since only 1 Energy card is enough to get the Slowpoke.
If the player visits here at the start of the game, all four members will be locked inside a cage with no one around. Once GR3 is defeated at the Water Club, he comes here and the player will be able to battle a second time to free the Fire Club. When the player then revisits the club, Adam and Jonathan will both battle the player while the others do not have their decks available.
A man in the Lounge trades a promotional Meowth with the player for a Flareon.
In other languages