Quidditch in HOL is played on IRC and is based on Harry Potter trivia. This trivia is taken from the 7 Harry Potter books, Fantastic Beasts and Where to Find Them by Newt Scamander and Quidditch Through the Ages, by Kennilworthy Whisp.
Each House has its own team. Students, Post Graduates, Professors and Professor Emeritus can all play Quidditch for their House, as long as they are in an 'active' status.
Find out more about HOL Hogwarts Quidditch in the Quidditch Handbook. You can see the basic rules for both Quaffle and Snitch play, as well as more in-depth detail about this game.
As Emma said, in her post of 13 Jul 2005:
That holds true to this day.There's a lot of work going into House Quidditch here at HOL. To get on the house team, you need typing skills and trivia skills, as well as the abilities to stand out in a crowd and to work under pressure. If you don't have that, well, you can try out anyway, but those make a good player.
If you are interested in trying out for your House team - click on the relevant link below!