Funny you say that, in Spain there has been a "trending topic" joke in the various social networks about a specific Zara womens jacket that every other girl (and older ladies too) wears. It even made the (less serious) news in major local newspapers (El País, El Mundo). People refer to it as the "Amancia" because of Zara's (and the parent company Inditex) founder, Amancio Ortega (who is spanish).
It's literally impossible to walk around town (not even major city) for 10 minutes and not see at least one of those. I saw 4 of them in like half an hour in a very small town (~100k) last Saturday. This one is easy to spot due to colour (it's yellow) but looks like 80% of women between 20 and 60 has at least a biker jacket, most of them in black, and since it's the perfect weather for this kind of jacket, they're everywhere. Much fewer guys have biker jackets it seems.
The jacket in question (Click to show)
Meanwhile I bought my first biker jacket last winter (a Falcon). To make things worse, I work in IT.