**edit: this restaurant has CLOSED -11/25/07**
Paris Creperie is a real nice place to eat and it's a *great* place to hang out. It's located right across the street from MGH, probably a two minute walk from the Charles/MGH Red Line stop.
They serve smoothies (including Nutella flavor!) and a wide variety of crepes: breakfast crepes, dessert crepes, full-meal style crepes with meat and cheese and veggies... my personal favorite is the pizza crepe which costs less than $5.
It's really the small touches that make Paris Creperie a personal favorite. They've got a pitcher of water to which you can help yourself, a giant basket of free newspapers to peruse, good music and friendly employees. Highly worth visiting.
326 Cambridge Street
Boston, MA 02114