The 'Pa' is for parking. This is, in fact, a parking garage. If you want to see the crazy lights yourself or park in it, it's in Santa Monica on 2nd Street between Arizona Avenue and Santa Monica Boulevard. Also, consider seeing a movie at the Laemmle's theater across the street. We saw The King's Speech. It was good, in case you haven't heard.
In other news, I finally posted some photos from my recent New Orleans trip! Check it out!