Hungry Union Square shoppers gravitate to this counter for its namesake crepes and beautiful French sandwiches. However, it's also a wonderful spot to try potent, housemade kombucha, a fizzy, fermented tea touted as a health elixir for digestion, healthy skin and hair, liver function, and body alkalinity. Flavors change seasonally, but skew away from the overly sweet flavors typical of mass-marketed kombucha and toward more sophisticated tastes like rose, ginger, noni (a tropical fruit), and cayenne.