You can dress casual or nice. People go there just because or for special occasions, so you won't stand out too much either way.
You can go in any attire. They are accommodating to everyone.
I agree with the above responses, dress down or up. But if you are looking for a "fancier" atmosphere, this isn't the place for you. It caters more towards casual then it does towards fancy.
Dress for the evening you're having. I've seen people come through in jeans and people in suits and fancy dresses.
What ever you want. Dress casual. I love it
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