The University’s “Visit the UA” site has lots of information about visiting campus, including things to see, places to eat on and off campus, etc.
There are a number of fast-food restaurants, coffee shops, sit-down restaurants, and bars within 2 blocks of the conference location (on University Blvd. and Park Ave.) The Student Union, at the center of campus, holds more fast-food choices (services limited on the weekend). Heading six blocks west (away from campus) on University Blvd. will take you to 4th Avenue, which has many coffee shops, bars, restaurants, souvenir shops, etc. etc. If you go all the way down 4th Avenue (about a mile south; a left off of University Blvd. if you are coming from campus), you will end up downtown, where you can find more restaurants, bars, etc., as well as a few clubs, entertainment, etc.
ATMs are available on University Blvd. (Wells Fargo), on Park Ave. (Chase—bank and ATM), and at the Student Union (Wells Fargo, Chase, Bank of America, and others).
The Student Union is also home to the main University of Arizona BookStore. Supplies, souvenirs, and basic necessities are available here. Some toiletries, etc. are also available directly across from the book store in the U-Mart.
Copies are available on weekdays (closed on the weekend) from 8am-5pm at Fast Copy in the Student Union. There is also a FedEx/Kinko’s about 1.5 miles from the conference site (at 2607 East Speedway Boulevard).
If you’re interested in seeing what the rest of Tucson has to offer, take a look at the Convention and Visitors Bureau’s website.