Someone once told me that you could tell that a restaurant was exception from the fact that it was cash only. Why else would customers (especially college students) put up with the inconvenience? Uncle Sam's is the proof of this.
I came here a lot to order the ultra uncle sam's special and it was phenomenal. The beef is super juicy, it's loaded with cheese, onions and peppers. The bread is great and if you keep it around too long it'll soak up all of the meat juice and fall apart on your lap. But it's sooo good. And they give you all of the fries you could ever ask for.
Top notch place. It's also right by a PNC ATM (though there's an ATM inside too if you want to pay a ridiculous fee). And right by the Murray and Forbes bus stop. So good. Definitely stop by for a meal.