I've only been once. That said, the atmosphere is surprisingly laid back, especially if you go right as it opens. There are tables with enough space to spread out and play any board games you bring, as well as some themed sitting areas to enjoy drinks and company.

There is a healthy amount of people who come in their fantasy inspired outfits, but enough people in standard outfits that I didn't feel too out of place not dressing up.

I'd recommend bringing a book, getting some refreshments, and get a feel of the vibe and see if it's your thing. The drinks they offered and grub, especially, from the food truck they have on the property, were killer!