For a fast food hamburger joint, I really like Freddy's. It tastes and feels different than your normal McDonalds and Burger King. The hamburgers are really good but be warned the patty itself is super skinny. Also, they have the skinny french fries which I prefer over the fat ones! If you have room after your meal, try the frozen custard. I usually have a mix of chocolate and vanilla, bet they have many options to suit your taste.
This restaurant (fast food) reminds me of a place from back east called Friendlys..not sure if they are still around.