Bristol all the way! I don't know London well enough to find my way around, the others are all too far away, and nobody wants to go to Birmingham on purpose.
I've never been to a launch party, but I imagine it will involve everyone standing in opposite corners of a large hall, with their one friend or on their own, not talking, sipping red stripe beer from a plastic cup while a playlist solemnly drones on in the background, attempting to be furiously busy at work on their Pandoras? Until the alcohol kicks in anyway.