So two things.
1) I have worked with a number of Muslim women here in New Zealand, women that came here from across the Muslim world. Some wore a head scarf, others didn't, it seems to be a personal thing in countries such as New Zealand. I have also worked with Exclusive Brethren, and some the women wore head scarves all the time, others didn't. I have also been in a number of churches where many of the women were hats or coverings, and many didn't. The same thing seems to apply to them all, it's a choice that some follow and some don't.
2) I'm going to point put that by tradition in Maori society, that when they are meeting together the women sit at the back while the men sit at the front. Sop all this hand whinging over the Muslim population doing the same, especially by people outside of NZ, I seriously, and politely, suggest you go stick your head in a bucket, then go and fix your own countries before telling us what to do in ours.