Somewhere around Bislet, I believe, but I found it quite interesting that the taxi driver knew where it was, while Vinderen was almost unheard of. Well, I got there, that was the important thing. My residence in Oslo is at Skoyen/Sjolyst - and Toyen is often the taxi drivers answer.

"No, Skoyen please"
"Toyen"

I always get there, but you need to be awake sometimes...