Create events and generate a QR-code your visitors can scan to join the event.

Users gets a count showing how many of the events they have joined.

Previous visitors can see all of the comming events.

You get a list of all visitors where you can draw a random one to win a price, multiple enters gives higher chance of winning.

Set admins to help you manage the visitors, and set security conditions to enter an event like: Event code, Geolocation or Manual approval.