The signup has become immeasurably important in my youth ministry. Volumes of communication to youth and parents are spent urging them to sign up for things on Signup Genius or through our church website.
You plan around the students who sign up, and while you should most definitely build in a contingency for attrition, the ones who don’t show, you also need to have a strategy for the opposite, the students who show up but didn’t sign up.
That feels like where a lot of fruitful ministry happens, the space where a young person showed up and said, “I’m here to be part of this thing, though I didn’t sign up.”
I don’t ever want to be irritated about a student showing up, even if they didn’t sign up.