Lizbud, there are two cellars to put bikes in - I usually do in winter, but I still haven't, and but most don't, because it's a pretty steep way down and quite awkward. A lot of young people have moved in in recent years, so that means even more bikes, and also these ones, in which they put their children and groceries.

http://www.christianiabikes.com/imag.../elcykel_1.jpg

This is a newer version: http://www.abcbaby.dk/burlanh.gif

There are smarter ones, but you get the idea.