They know how to do Patrick's Day here

Dateline: Chicago

Observed:
Three folks in janitor's uniforms (two guys and a woman), standing by the Dearborn Bridge, necks craned, looking back and up across the river, talking on walkie-talkies. Discreetly walk past them, then turn and look back and whatever they're looking at:

22-story building across the river, all windows dark, except for offices where they've replaced overhead incandescents with green bulbs, yielding a green shamrock covering about 12 floors, while the janitors across the river look back and talk them through the last few bulb-switches.

Boy, I like this city a lot more now than the last time I was here.