How to automatically evaluate certain lisp code after starting an emacsclient?

When starting Emacs, init.el (or .emacs.el) is evaluated. However, when starting emacsclient, no similar lisp code is evaluated.

How can I get a lisp file to be evaluated every time I open a new emacsclient?

(This would be handy for frame specific customizations.)

I assume the answer is to use some hook, but I can't seem to find the correct hook to use.

I look forward to your answers.