I'm coming down from Santa Rosa tonight to have a quick dinner in the city with a friend who works near Union Square. We're looking for a place that will be relatively quick without a reservation, but will offer some healthy options (we both eat meat, just looking for some veggies and something lower in calories). Informal is fine, just looking for good food fast. In terms of location, I'll have my car, but she'll have to get dropped off at BART afterwards. Any thoughts? Thanks!