I have to recommend this lovely hotel, Hotel Hellsten. I was there last week having breakfast, and I think it´s one of the nicest hotels I´ve visited in Stockholm. First we had a lovey breakfast where you could make your own waffles, and eat them with fresh raspberrys.
Breakfast:
Then we were guided around to see the rooms and the conference. It was very beautful/hip/trendy/boutique/design/personal, no room is like the other.
The bar is really nice, and every Thursday they have live jazz, free entrance.
The bar:
The lobby/social room:
Visit their website, to see better photos than mine!
http://www.hellsten.se/eng/index.html