Groupon had a coupon for $20 worth of credit at the arcade available for $10, and I used a discount code to further reduce the cost to $9, and used cashback tracking to ensure I receive a further $1.23 cashback after the sixty day waiting period passes. So that's 61.15% off the sticker price for air hockey, basketball toss, and gator spank. This kind of financial ingenuity is exactly why I've paid off my mortgage in just under five years.
Not having kids may also have helped.
And I didn't even include the value of potential ticket prizes in the above calculations!