I don't think that there is a formal dress code, however it is a very nice and upscale restaurant, so you may feel uncomfortable in that environment if too dressed down (e.g. shorts / flip flops) so I would suggest minimum smart casual i.e. ladies - smart clothes , men - full length trousers, closed toe shoes and collared shirt. I would suggest that a tie/jacket is optional.

We were wondering and we went and wore jeans and nice shirts and felt comfortable - there were people in shimmering short cocktail dresses as well so it seems like a pretty broad scope of what you can wear here.

Shorts and a collared shirt works.. I always choose business casual. Enjoy!!