In my regular shul there's a lacy curtain, and we sit in a balcony. Yes, we have a classic Ezrat Nashim, Women's Section. Depending on where you sit, you can see through the lace, the holes. It's important to know what's happening, when to sit, when to stand, when the Aron Kodesh, Holy Closet where the Torah Scrolls are is open and when the Torah Scrolls are being carried and held.
I don't like those modern, OK very twentieth century, Orthodox synagogues which are set up in the round, men and women staring at each other. That's sometimes more problematic than sitting together.
Even worse for me are the curtains which can't be seen through. I took this picture in a small local shul where I heard the megillah, reading #2 out of 4.