If I lived any closer to Happy Dog I would be in danger of going there everyday. I've been here several times and it has quickly become one of my favorite spots.
For $5 you get a hot dog (or vegan sausage) with unlimited toppings from their mouthwatering toppings menu. With a plethora or homemade sauces, chilis, beans, etc. you'll be tempted to just order everything on the menu but try to limit yourself. Don't worry about picking the perfect combination, the menu is made as though you cannot choose wrong.
One hot dog of endless toppings is more than enough to fill you up but it wouldn't be a proper trip to the Happy Dog without an order of tots (again with however many homemade sauces you are willing to try). And if there's a topping you were too afraid to get on your hot dog now is the time to try it.
As if all of that weren't enough, Happy Dog also has a pretty decent beer selection.
Be Aware: They also have live music quite frequently and if you get there after 8:30 on one of these nights they do charge a cover and it will be very loud.