Hotels
Nearest to the venue
Thon hotel - Ullevål stadion
Only one stop with the metro and in walking distance. It is not in the city centre, but all you need is in the neighborhood.
Near the city center
Thon hotel Opera
In the city center and near both the Train station and metro.
Cheaper options
Citybox Oslo
In the city center. Cheap, nice and practical, but without breakfast.
Comfort Hotel Xpress Youngstorget
In the city center.
Cochs Pensjonat
Cozy guesthouse, not too expensive, near city center and the Majorstua (second city center in Oslo). From there you can take the tram or the metro to the venue.
Appartment
Beautiful and quite area. You can take the tram combined with the metro to the venue.