Listen:
The Friday Business Report with AZPM's Zac Ziegler and Inside Tucson Business Editor David Rupkalvis look at the longest-running establishments in Tucson's business scene.
This week, Zac and David look at a handful of Tucson businesses that work in unconventional ways, from a business forced by federal law to operate on an all-cash basis to businesses that stay afloat through a devoted customer base.
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