Yes, it's artsy. Yes, it's bohemian. I get that this might not be YOUR style. That's fine. At the very least, though, recognize the fact that they have artfully made a cool (temperature) place to relax and it will subsequently lower their cooling bills!
I love banquettes. They provide a function seating area, with more interest than your typical sofa or chairs. While often built-in, they can also be an armless sofa at the dining table or simple window seat.