I've been to Zachary's dozens of times over the last 5 years and it never gets old. The pizza takes a long time to bake, which gives me the opportunity to have a 24oz imperial pint of my choice of a dozen or so excellent mirobrews and imports. They serve 24oz beers for the same price that other places charge for pints. It's actually worth going there just to get good cheap beer.
The pizza is out of this world. They have a wide variety of toppings, many of which you can't get anywhere else in town. I have taken a lot of friends from out of town and they all love the place.
Also, Z's leftovers are awesome the next day!
Pros: bang for the buck, great beer selection, best pizza in town
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