One bicycle style trend that doesn't seem like it's fading is the fashionable fascination with vintage mini-bikes. These 'mini bikes' came onto the scene in the 1950's. They were a reply to the booming car culture. Most of them were foldable - nothing fancy like modern folding bikes, just fold them in two - in order to fit into trunks of cars and/or on trains. They were never a massive hit in Northern Europe.
A couple of years ago I noticed that young fashionistas were riding them again. Out of the blue. The trend continues even today. Retro, vintage bikes once relegated to use at summer cottages are now chariots of cool.
Where they all came from I'll never know. The summer cottages of the nation must have been scavenged in the search for these bikes. Although several were spotted at a flea market near Mauer Park in Berlin a month ago. Roughly €35 will get you one.
Or just graduate from university, like my friend AK recently did, and you'll get one as a present, like she did.