It's a little hard to wrap your head around the idea of avocado juice. "How can you juice an avocado?" we wondered, but we were too intrigued by the table of Ethiopian soccer players eagerly gulping (or shall we say, slurping, not without difficulty) them down not to try a glass of the cool green...slime? It might look like grocery-store guacamole, but in a tall glass with a straw, this $3 concoction is nothing short of miraculous: the texture of a milkshake but the omega-3 goodness and addictiveness of our favorite fatty vegetable. For 50 cents extra, order it mixed with strawberry or mango juice for a hint of sweetness swirled into one mellow treat.