(As far as I can tell, the “original” source is this isn’t happiness.

I knew my city was Weird!

That’s at Le Schnurrbart. (If you click the picture, you can see that it even says “ph’nglui mglw’nafh Cthulhu R’lyeh wgah’nagl fhtagn” underneath.)
I know where I’m going to have my next drink.