Vegetarians should beware of the fact that things that seem like they could be vegetarian might not be due to various animal stocks and fats that are not indicated on the menu. Of course, I am sure most vegetarians are used to that in restaurants.
Anyways, my vegetarian spouse and I (I also eat seafood) went to Lark a few weeks ago. I think they only take reservations for large groups, but we went on a weekday and did not have to wait although the place did fill up. I thought the casual ambiance was very nice (I’m a pretty casual guy) and the service was very good. Our main waiter and other servers were very knowledgeable and really knew what was in all the dishes… helpful for those of us with dietary restrictions… and what stuff could possibly be altered.
They have a largish menu, but due to our vegetarian constraint we ended up ordering everything they could make vegetarian, which was maybe 10% of the menu. The food itself was in general very good; the wild mushrooms we had were very very good, as was a whipped potato dish. The one fish dish that I sampled, the tuna carpaccio, I found only OK. We also had dessert: a nondescript berry tart (mediocre) and chocolate medelaines which were very very good.
Overall, the food was very good and very pricey. The dishes were tapas sized (obviously) with almost entree prices. Of course, we were limited to a small subset of the menu. I did note that portion sizes seemed to vary quite a bit for other diners, so the value/price ratio probably varies quite a bit. I am sure omnivores would have a much different impression of things.
I am unsure what I think of the place, because the food was good, the service was good, we spent a lot of money, we had a good time, and I was still hungry when we left. I will have to go again sometime when I generate more $$$, as I don’t think I would regret going back.