This is probably just me, but I chuckled just now when I remembered the 1996 Coors Light Super Bowl commercial "Rocky Mountain high". In this ad, stranger enters the bar, is eyed up by all the local barflies, and then they break into song....
Coors Light - Rocky Mountain High (1996) - 0:60 (USA)
Isn't that pretty much the base story of the Budweiser 2011 ad "Wild West"? Except of course, it's set in the wild west, the stranger is scary Peter Stormare, and then they break into song..... Funny brainsync.