All-day happy hour on National Margarita Day

National Margarita Day, an occasion which some people may mark with an all-day happy hour, while those that don't probably should.

Ever since Barman "Willie" concocted the first Margarita around 1934 for Marguerite Hemery in Mexico City, the cocktail has lubricated many a drunken bachelorette party, cruise, Cinco De Mayo and backyard BBQ.

But on this glorious National Margarita Day 2011 we want to hear about those places where you've enjoyed a margarita, even if you can't remember where it was and only have photographic proof.