You guys can't listen to tunes? Bumout. I work in a cubicle farm too and my tunes are the only thing that keeps me clinging to life during the day. I sympathize with you man.
At my old job, we could have tunes. The whole atmosphere was much "busier". Lots of talk, more noise in general (including an army of old-school line printers constantly cranking), but you could play tunes in your cubicle as long as it couldn't be heard beyond the walls. That was easy, because as soon as you stepped out into the aisle, it was all noise. Our cubicles were actually pretty nice. High walls and decent sound-absorbing fabric. I had some shielded PC speakers that were pretty nice for the time, and listened to tunes all day.
My current office is the exact opposite. It's really quiet here, and if I played tunes, people would definitely hear it, and there's an actual rule against it. I could go with earphones, but I can't work with earphones on. They bother me, plus I have to be able to hear if someone pops in to ask me a question or if my phone rings. So yeah, it sucks.
Side note: The other day, I went past the cube of a new guy, and he had
headphones on. Old style, over-the-ear, big cushiony speakers engulfing each ear. They looked super awesome, but somehow amazingly out of place at the same time.