Queueing in your local arcade

I wonder how many ways people queueing for Pump?

Here in Indonesia, at least in my city, people swipes in their credit and everyone remembers the sequence. Usually people forgot though, and we talk it out or just follow one person who watch the queue. In case of there are too many people, sometimes we use paper and pen, or put queue in the chat group (whatsapp)

I've heard of people queueing with coins, how does that work? What coin you use? I assume you use arcade coins, what differentiate whose coin is next?