When you swipe the card it will tell you the balance one the machine the game you play and no there is no discount
The best resource for this would probably be found on the scene 75 website. Upon each swipe of your card when at a arcade machine, the display where you swipe will indicate your remaining balance. And at any time there are kiosks at the front of the building where you can check your balance. Also I would imagine you would be charged for a two-seater cart not per individual
I'm not sure about the carts. But yes each card is separate from any other cards u may have
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