$18 - 1hr $22 - 1 1/2 hrs $25 - 2 hrs Check Groupon & Living Social before going. Sometimes they have deals.
Its $18 for one hour, $22 for an hour and a half, and $25 for two hours. Plus the cost of food if you want to eat there.
Check Tianna's answer
I think it's around 8$ a person
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