How to add zsh and oh-my-zsh?

I need to setup 10 new Macs and I've looked at various solutions including boxen and other shell scripts. This is by far the best solution (for my purposes) that I've seen.

If I wanted to install zsh and oh-my-zsh, what would I have to do (besides installing zsh via homebrew)? Specifically, what's the best place to run the oh-my-zsh installer script?

Thanks for the great work.