Okay, so I never said spelling was my thing. I missed the presence of a second G in the sign and thought that the sticker refered to LEGO. I very nearly made a terrible mistake in this post. To be fair though, the sticker appears to use the same font as the real LEGO does, don't you think? :) For reference, this site lists the word "leggo" as slang for "let's go".

While we're on the subject of LEGO, take a look at the photos a friend shot of Nathan Sawaya's LEGO sculptures and art while she visited Portland in the US. They really are awesome.