I don't think this a good way of thinking about it. What are your real motivations for picking an office?
I don't think trying to 'game the system' and find the 'easiest office to join' will be a viable strategy.
Instead, put some time into chatting with your friends at these offices and unpicking what they like about it (or don't). Do you have friends / family in a given area? What's your real motivation for office preference?