01
Ask for the slot, not a biography
A name, an email, and the thing they are joining. That thing is usually a dropdown or a set of radios: a shift, a session, a dish, a volunteer role. Add one note field for the detail a choice cannot hold.
Put the capacity in the option itself, such as “Thursday 4:00, 8 spots,” and take the option off the form when it fills. The inbox is the list you check.
