One of the things I like best about Vietnam is the café culture. And by café, I mean any collection of plastic stools on the sidewalk, set up by an entrepreneurial local who mixes drinks for her neighbors. At any time of the day, along the streets of Saigon, Hanoi, Hoi An, etc., the Vietnamese just crouch around wobbly pastel tables and sip their drink of choice. Whether it's cafe sua da, sugarcane juice, aloe vera shake, or passionfruit juice, the icy beverages are practically lifesavers in a s