How do I find a landline on short notice?

Where might I go to gain the use of a landline for an hour or so during normal business hours? I recently received a request for a phone interview from a potential employer, who specified that it must be carried out over a landline. I feel this is a reasonable request given the degraded voice quality and dropped calls that come with cell phones, and I'd really like to get a job with this company besides. The problem is that I don't have a residential landline -- all of my personal phone traffic is through my cell phone. I can't use the phone at my current workplace for obvious reasons, but I'm having trouble coming up with a solution that would allow me to comfortably use a landline for an hour or so sometime within the next two weeks. Thanks in advance for your suggestions.