Au Bon Pain
Right next to the student union on College Avenue is Au Bon Pain. This popular coffee shop/cafe often has a line during term time. You can get coffee, fruit, baked goods, sandwiches and more - basic cafe fare. If you are a college student, show your ID and you don't have to pay tax.
The cost is decent, but it's not the cheapest place around. Sandwiches run between about $5.00 and $8.00. Coffee is about standard. If you are ordering a drink, you pick it up from the right side of the counter. If you order food, you'll pick it up at the left. The queue situation in general is a bit muddled - typically there are a number of people in front of the till since there isn't really room to form a proper line. Just keep an eye out for your order in the "line".
There are tables and chairs available inside as well as outside (when the weather is nice). They fill up during peak times, but there's usually spots available. It's a good meeting place and the food and drinks are yummy. [more]