you don’t need informed consent for exercise. It’s JUST exercise. You know how you can tell the difference Eastern religious yoga and American just exercise yoga? Women. Religious yoga is just for men, if the group is mostly women it ain’t religious.
If it’s just exercise, then you won’t mind if the instructors inform the class about facts like in post #151.
If it’s not just exercise and you have some sort of agenda possibly unknown even to yourself, then you will put up a fuss about it.