I feel the same as you, joannenewton. I wouldn't like single sex housing.
There are some almshouses near where I live. I think they're Victorian, but they've been well-maintained. It's not sheltered housing, but there is a a caretaker, who takes care of management issues and maintenance. I've put my name on the list, but I know that I'll have a long wait.
As far as I can work out, they're only for rent, but not just for people who are eligible for social housing. Children aren't allowed, but I understand any adult can apply, as long as they are of 'limited means', ie can't afford to buy. A 'board' decides who is eligible, which sounds a bit like the Victorian poor law boards, but it does mean they can be more flexible than the council. I understand quite a few divorcees live there. We'll see.
I certainly think that the government and councils needs to think more creatively about the needs of more elderly citizens.