If you happen to be spending your day across the street in the courthouse - or in the vicinity for any other reason - and have the chance to make a break (past those obnoxious metal detectors), then Esposito's is a decent choice. They even have daily specials. I don't know if they vary, not having been in the area often enough to tell, but when I have been there they are something like two slices and a drink for a few bucks.
The slices are a pretty fair rendition of a New York-style pizza, and if you can get there early enough (meaning in front of the rest of the mob trying to get their food and get back to the courthouse), then it comes out fairly quickly. If you get stuck in the middle - or worse, at the end - then it may be a bit slower, but even worse, you have to wait in a line that doesn't move very fast at all.
As a nice bonus, they also have a decent cannoli - possibly even better than some of the bakeries in the area. Though I don't think the shells are freshly made in-house (I could be wrong), it tasted better somehow. They would have been nicer with something other than chocolate chips from a bag, but hey - you can't be too picky, right?
There are also other items on the menu, but since I've only been there once, I can't really speak to them. They do take cards, which is nice since you don't have to have cash on you.