You want auto-registration when there is no event registration?
That's usually the way it works. One or the other, not a combination thereof.
If a chapter wants to charge a fee, they need a Fee.
If a chapter needs a head count (so they can order food, for instance), they need a Register button
If a chapter wants neither of the above, they just want to have members sign in and out, they Auto-register. Asking them to set a fee of zero and then come back to Auto-register confuses Admin and/or is a waste of time.