Professional firms are usually named after the surnames of their partners. Think of law firms such as Freehills and Allens Arthur Robinson, for example. Moving on from that, both Pink and Floyd are surnames. Therefore it is a possibility (however unlikely) to be represented in court action by a law firm called Pink Floyd. Further to the point, it is not outside the bounds of possibility, to be represented by a lawyer who happens to be a paranoid bass player who tries to convince the judge that the system is corrupt.
Rock history note: Pink Floyd was named by original frontman, Syd Barrett, who borrowed from the names of two blues artists, Pink Anderton and Floyd Council. That means, as a musician, I could call myself any number of surnames I like in a string and practice whatever profession I want, while pretending to be a complete firm, just to make ends meet.