Did you ever ask yourself WHY?
In traditional orthodox Jewish synagogues men and women sit separately. This practice allows the men and women to keep their focus on God and the prayers and not the opposite sex.
On a more spiritual level men and women have different souls, from complementary but opposite sources. When praying Jewish people aim for being with one’s true self, to communicate with their soul. Men and women need space from each other to help them become intuned to their higher selves. Sitting separately allows for this freedom. (commentary by Aron Moss;)