Like I said, go into one of the private offices. Or don't go into the office.
Not being aggressive here just interested.
And the music choice isn't really enforced... we built a shared music server controllable via web and chat where everyone can request and vote on songs collaboratively.
PS: its simply the noise, I'd be the one in the corner with the noise cancelling headphones requesting the 'sea sound' track every day. I'm sure your music choice process is very democratic.
We have a shared workspace too, modeled after Bell Labs' famous Unix Room. It's nice to work in there from time to time, but everyone except the interns also has a real office of their own where they can store hardware and records, make phone calls, or just hide away to work on a paper. I think having a personal office to which you can retreat when necessary is very important in making shared workspaces actually work.
Heck, over the course of five jobs I've never been at a place where it wasn't open-plan with music playing. I've unfortunately needed to acquire a collection of earplugs and headphones to defend against the noise.
I have seen one place with private offices (albeit for higher-ranking management), and that was at Yahoo! Everywhere else had management on the benches with the rest of the team.
Maybe it's a cultural thing around here in Sydney.