Plaid is a fun little cafe style rerstaurant near the ASU Tempe campus. Their prices are reasonable, about $6-10 for a meal. A couple of good beers on tap. Great vegetarian options. Yummy healthy food. Great desserts.
Drawbacks: They almost never have the deserts listed on their menu. If you are unlucky enough to patronize Plaid on a night which they have a guest band playing, your hearing will surely be damaged. Plaid is a small place and if a non accoustic band is playing, you wont be able to hear the person across your table.
If you are going on a thursday-saturday night, I recommend calling ahead to see if a band is playing.