The Greenhouse Tavern I'd say deserves 3.5 stars. Definitely has its own unique vibe, think a cross between library and bike messager turned bar.
The service I thought was disappointing. Not real friendly, not rude by any means but didn't smile or seem like they cared one way or another.
I had the Lamb burger, very expensive for a burger but really good.
Definitely worth checking out and planning a meal there.