artchill
If there are 10 Jewish males over the age of 13 sitting seperate from the women that is called a kosher shul.
They must be Shomer Shabbos, not just Jewish.
What if there are 10 Jewish males with a lady Chazzan/Rabbi? Whould you say thats a Kosher Shul? What if there “davening” in English? Accompanied by an organ on Shabbos? What about a “shul” that gives aliyos to ladies/girls? artchill, would you call that a kosher shul?