The May 2010 edition of Tucson Green Times includes an excellent writeup of my favorite Tucson coworking spot, Spoke6. Centrally located in the Warehouse Arts District, Spoke6 is run by Tim Bowen of Creative Slice, a Tucson-based web design agency.
I work there once a week—usually on Friday—and love the quite, productive atmosphere, fast WiFi, and the ability to connect with like-minded individuals (learn more about coworking). It’s also within walking distance of three areas: Downtown, 4th Avenue, and University Boulevard, all of which offer great choices for lunch or a post-work happy hour.
You should come try it out if you live in the area. Your first visit is free!