I am a University student in Den Haag and as my place is very big, I do sometimes welcome people to stay over:) Although, you have to be aware that the room is shared with me in all times!
It has a perfect location! It is 13mins by tram to the city centre or 10mins by bike. There is shops - from Albert Heijn to Turkish shops, post, liquor shop etc. behind the corner. It is also very close to the Holland Sport train station which has direct connections to other cities:)