Room in a 7–9 bedroom flat...Is this normal in Madrid?

I've been looking at room listings in Madrid, and I just wanted to ask, is this normal now?

I'm seeing places where you'd be sharing with 7, 9, even 13 people, which just seems insane to me. I've even come across listings where you'd be sharing a room with another person, and they're specifically looking for a working professional female to share with a student.

Is this actually the reality of renting in Madrid now, or am I just looking in the wrong places?