Casual, but you can also make a special night of it, especially upstairs.
Salads are particularly fine, but just about everything is done well here.
It's too small to be both, especially on nights when the upstairs dining area is not open. This year Coco's plans to bring back some of the performers it has featured through its 20 years. One of my visits was on a Sunday, and when I called to make a reservation I asked whether there was a band. Just a solo singer, I was told to my relief, and I specified a table as far away from the music as possible. This is a real shame, because the food here is too good to have one's dinner spoiled this way.