I'm in a women's chat group on Teams at my job that has one or two smart, kind, fun, trustworthy women from many, many departments, who share stuff from our lives, help each other out when one of us needs a contact from one of our areas with membership, and sometimes collaborate on projects. It's called "the cat group" because it started out as a three-way chat where three women who were friends posted pics of their cats. Then more women with cats got invited, then we changed it to allow women with dogs, then any pet, then any pet OR kids, then a plant counted, and finally women who have no pets, plants, or kids.
At this point, it's evolved into a secret sorority. A lot of people suspect it exists, but if you bring it up, anyone in it will say, coldly, "there is no cat group." which some people point to as evidence that the cat group IS real.
To get in, you have to be nominated and seconded by a current member, then you have to submit a few pictures of your cat, pet, child, or plant, along with names. When we started inviting women with none of those, we just gave them an attestation to sign that they would like to see pics of OTHER people's. The group then reviews your pet or child to determine whether they are cute enough to continue your application.
Then you have to solemnly swear that you will not join an MLM while in the cat group, and if you do, you may never attempt to recruit members or market MLM garbage in group, under penalty of banning. THEN we vote on adding the new member.
Since the group itself is a secret but made up group with well-documented but made-up bylaws, we change them all the time when we get bored, but the MLM attestation has never changed and never will as long as I'm a member.