I always associate lime rickeys with Boston, because that's where I first had them, the summer my parents and I spent in New York and Boston when I was eight.

I wonder if they're regional. I think of them as a normal part of the fountain soda landscape, which of course doesn't so much exist anymore—I almost ordered one this afternoon at Schoolhouse Ice Cream just because I was so happy to see it on the menu.

[edit] It's regional! Originally the Prohibition-era virgin form of a nineteenth-century cocktail that became a popular drink in its own right. The raspberry variant is uniquely New England. I'm delighted.