I'll second the Pandora for your smartfone. I liked it so much I subscribed for a whole $3.99 a month. I created different stations so I can listen to different stuff depending on whether I want something more mellow or more rock or whatever. On the occasions I want to listen to someone giving a talk about something, I have plenty of videos qued up in my "watch later" on youtube, which I can then listen to while I work.
I connected my phone to the receiver in my shop using a 1/8" stereo jack to RCA connector cable. And obviously you'll need a good signal in there. You can use Pandora for free, but you'll get short commercials. If you like it, you can eliminate them 100% by subscribing.
As far as your particular building goes, I noticed yours is a steel frame, where mine is the typical steel cladding over wooden posts. I don't have any problems with radio or cell reception. I'm guessing the frame work is grounded on your place which will create a faraday cage effect. A quick confirmation would be to measure voltage between a frame rail and the hot terminal (the smaller of the two rectangular ones) on a receptacle. A reading of around 120V means the frame is at earth potential.
