Example of Volunteer Sign Up Post and Event Post
Those who sign up will get a confirmation email:
The poster/sender can access the post dashboard (blue down arrow to top right corner of post) to view who signed up for each job. They can send a message to select volunteers if something changes without having to spam everyone.
The event post will look like this. People simply click the link to acknowledge they'll be attending.
Group members will receive an email notification and can RSVP directly from the email by clicking a button.