My place has women only and men only times, it also has Jewish men/women only times.
They're a business at the end of the day, one that has to cater for their clientèle. It's in their best interest.
Do I care necessarily? No, because I can only speak for my place, but on peak times these restrictions don't apply. Like weekends. It's mixed. These special interest times are usually in off-peak hours, when I have no interest in going.
So I suppose because it isn't MY problem, I think it's OK. As ignorant as that sounds, and is, that's how society is. People are very caught up in their dogma, unfortunately.
Yeah by definition it's sexist.
To say otherwise is flat out being a liar
It is but isn't.
Some women just don't feel comfortable with men (perhaps they have had something happen in their past) or because of religion.