Tory Row sits where the old Greenhouse Cafe used to, not that it matters. The only reason it is brought up is because of the location - absolutely perfect for Harvard Square, if you enjoy watching the night go by.
The floor-to-ceiling windows make sure that you can see the street scenes from nearly anywhere in the rather cramped bar, and the cozy confines explains the design of their totally sweet (and not badly priced) pitchers.
They also have cool things to look at on the inside of the bar, such as the hand-drawn chalk renderings of the beer selections, and the ubiquitous cute waitress.
Probably not a place to stay for more than two hours, but certainly worth a stop for variety. Also, the chance of a fight breaking out is next to zero.