1. "A women's club" is, in your terms, singular possessive. It is a club whose members are women. "Women's" is a classifying genitive.
Another such example is "a girls' school".
2. "An/The audience's reaction": "audience" is a collective noun involving a group of people.
3. "who's job" is not acceptable. Say "whose job" instead.
4. "A king's rights" again may or may not involve a classifying genitive, depending on your way of interpreting the word "king". As a classifying genitive, "a king's rights" literally refers to those absolute royal privileges enjoyed by a king, whose will shall always be fulfilled. Figuratively, it means some special privileges, which may appear high-handed.
Another such example with "king's" is "a king's ransom", a very larget amount of money.
Unlike "a women's club", if you have a particular king in mind, "a king's rights" may not be a classifying genitive. In that case, it refers to the rights enjoyed by a particular king.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .