THE ELECTRIC INN. FIND IT. USE IT. SHARE IT. Somewhere in the streets of Stockholm there is an electric box which you can enter to stay warm and dry in. All you need to do is to find it and open it with a beer bottle. If you want to sleep somewhere else, just take it with you and hide it well. But remember: It's for use in public spaces only.
Good Luck and
Have a nice nap.