We discourage any styles from the 80’s because they’re so uncool.
We discourage polyester leisure suits for the same reason.
And it probably wouldn’t be a good idea to show up in a clown suit.
…but other than that, you can pretty much wear what you like.

Most people dress pretty casually. A few wear business casual, but a step down from that is the norm.
Only first-time visitors ever wear a coat or tie (because they didn’t read the website like you are). The next time they’re back, they’re sporting jeans and a t-shirt.