Sagene is charming, with several bars, cafés and dining in immediate distance from the flat. Acclaimed theatre Torshov Teatret is within 5 min walk, so is Cosmopolite, Oslo's main venue for world music and jazz(URL HIDDEN)
A gym with squash, golf, climbing wall etc is less than 3 minute away!
Other things to note
The beds are with motor and can be adjusted to single beds if you like.