Intro class sign-up card — worked example
Last updated: October 11, 2026
Northside Bouldering Gym advertises its Saturday intro class with a poster at the front desk and a card on the mirror wall: twenty spots, and the moment the twentieth comes in the form says it is full and starts catching a waitlist for next week.
Card preview renders in your browser
Sample data：Scan the code on this page — it opens this page. That is the "url never dies" trick in one motion. Everything on the card is fictional; your own version takes your name in the workbench.
Start from a card like this →What happens after the scan
ON THEIR PHONE
One action, ten seconds
Any camera opens the card: no app, no login, no form six questions deep.
ON YOUR SIDE
The answers, live
Submissions land on the data page as they arrive — with the state the card promised: spots left, full, or waitlist.
One question this sample gets asked
What happens when the class is full?
The form closes itself at the number you set — nobody signs up into a class that is already standing-room. Later scans get the waitlist state, and you can promote people in order from the data page.