for familial reasons i once davened at shirah chadashah. the first thing i noticed was a top to bottom mechitzah. the second was that prior to youth groups, the young urchins were mostly in the men’s section so their mothers can have proper kavanah. 🙂
then again while only men had kohen and levi, the mother of the bar mitzvah had shilishi, unseen from the other side of the mechitzah, she stood next to table protruding on both sides of the mechitzah. 🙂