Postino is a fantastic wine bar with a nice ambiance. The wines are priced $8-12/glass, but happy hour glasses of wine are only $5 every day! During peak hours it is loud with music and lots of conversation. So do not expect a quiet romantic setting. But it's a lively atmosphere.
The wine selection is fairly large (maybe 25-30?) and they usually have other wines that are not on the menu. I had a moscato that was not on the menu and it was one of the best I'd ever had. Sweet and bubbly, which is what I was in the mood for. As for food, it is inexpensive considering the quality of the place and area. Paninis are under $10 and come with a small romaine salad. Or you have order the Pick 2 with half panini and a small salad/soup of your choice. I highly recommend the prosciutto and brie panini. The strawberry chicken is very good.
Postino is quite famous for its bruschetta though. It is pricier than other menu items but is pretty big and can be paired with a good wine and shared with someone. My favorite is the brie, fig jam and apple.
They have complimentary valet, which you really need during their busy friday and saturday nights or the weeknight where the bottles of wine are very cheap (I forget what night that is, but it's suuuuper cheap).
Come to Postino and you'll want to come back again. And again. It means "mailman" by the way. Maybe you'll want to become a mailman. And then maybe you'll want to come in to make the argument that since you are a mailman you should get a little discount or a free glass a wine. Try it and let us know if it works.