Two weeks ago, I wore a short sleeved blouse, khaki capri pants and leather sandals, my dh wore dockers, a polo style shirt and leather sandals. We felt neither under nor overdressed. There were a few women in dresses and a few men with dress shirts or sport coats (it looked like it might have been a business dinner or a men's vacation group), and at least one table of people in jeans. I figured, at least my pants weren't so low cut that my behind was hanging out when I sat down, like one woman's (who unfortunately was sitting with her back to me!)
Enjoy! We had a fabulous dinner there.