The Algonquin is named for a venerable grand hotel in Manhattan, luncheon spot for a famed circle of writers in the 1920s and 1930s. The lore is interesting, and well-documented, so I won't repeat it here, but I do encourage you to look it up!
This is a simple potion made interesting by the inclusion of unsweetened pineapple juice.
The pineapple juice does not have to be a stopper - I have an ice cube tray that makes 1" cubical ice cubes, of volume 1 ounce. So I fill some of the cubes with pineapple juice and I can have an Algonquin whenever I am in a literary mood!