Tessaro's grinds their burger beef fresh, so you can order yours rare and not worry too much about dying from e. coli (though I suppose the threat remains). I get my burger, rare, with caramelized onions and dijon mustard. It is euphoria-inducing.
This place is run by the most gracious and lovely women. I feel so at ease here, I wish I could move in. There is a sort of serene-yet-clubby atmosphere, like a men's cigar club that has been suffused throughout with a wizened womanly vibe. Whenever I come here I never want to leave.
The only downside is that if you go with your veggie friends, they won't have many options. So don't bring them.