I see that this thread is a bit old but this is the first time I am seeing it and I have to say-I LOVE IT!
I am also a big HP fan and it would be a hoot to do an HP room.
Personally I'd call computers Muggle Studies. Reading time I'd call Divination (since you want them to read their "tea leaves" and divine what it is about and make inferences and predictions).
Table groups could be Hufflepuff, GRiffendor, Ravenclaw ans Slytherin and you could award house points. Table captains (If you have table captains would turn in everyone's work and get supplies for the tables and stuff) could be prefects.
You could use the HP music for your transitions.
Instead of using a pointer you could use a wand.
This theme could just keep going
How fun