Need advice - Oslo with 7 people

Hey there, saw the threads on summer and winter vacation.. but I couldn't add mine to either, so I opened a new one...

I'm looking for something, that hopefully exists: a couple of my friends and I - presumably 7 of us - want to spend some time in Oslo, about 10 days would be good.
Does anyone of you know of a house we could rent, or some kind of accomodation where we could all basically live together?

If that's an unrealistic thing, we'll just get hotel rooms ;-)
Thanks for your advice!
Carla