No. We just went and some people dress up a bit and some people were in shorts and a t-shirt. One thing to note, bring something warm to wear because the cars get cold. We went in the middle of August on a pleasant night (75 degrees outside) and were in business casual attire and it was pretty cold in the car. The Air Conditioner ran the whole time and keeps it pretty chilly.
I've never heard that there is, but you can always call to check.
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