There isn't one. The room use to host the Duelling club was the Great Hall.
The person that has a duel with Harry James Potter in The Chamber of Secrets is Draco Malfoy
Lockhart
In the book, yes - Morfin Gaunt has a snake. In the film not really; Tom Riddle tells Dumbledore that he can talk to snakes.
I'm not sure... but out of memory i think 1 it's his dormitory and i think he finds it a mess after someone stole Tom Riddle's diary
Draco Malfoy challenged Harry Potter to a wizards duel at midnight. The chapter in which this duel was due to happen is called The Midnight Duel. Draco was actually tricking Harry and tipped Argus Filch off so that Harry would be caught out of bed.
Pottermore allows you to duel with other members.
The above video contains a walkthrough for the Draco Malfoy duel in Harry Potter and the Philosopher's Stone for GBA.
Harry Potter was put onto the Quidditch team in chapter nine of Harry Potter and the Philosopher's Stone. The chapter is titled 'The Midnight Duel'.
When you duel and only when you duel will it be co-op
Depends what year you're looking for; 1st Year: The Standard Book of Spells Grade 1 by Miranda Goshawk A History of Magic by Batilda Bagshot Magical Theory by Adalbert Waffling A Beginners' Guide to Transfiguration by Emeric Switch One Thousand Magical Herbs and Fungi by Phyllida Spore Magical Drafts and Potions by Arsenius Jigger 2nd Year: Basically all of Gilderoy Lockhart's books 3rd Year: Intermediate Transfiguration The Standard Book of Spells, Grade 3 Infogging the Future The Monster Book of Monsters 4th Year: ??? 5th Year: The Standard Book of Spells Grade 5 by Miranda Goshawk Defensive Magical Theory by Wilbert Slinkhard 6th Year: Confronting the Faceless Standard Book of Spells Grade 6 Advanced Potion Making by Libatius Borage 7th Year: They don't go to school.
The battle of Hogwarts and Harry and Voldemort's duel towards the end of book 7.
Well you duel them just like you would duel anybody else. P.S. You are supposed to lose the duel.