56 E 4th St between Bowery and Second Ave (212-473-2047). Subway: 6 to Bleecker St. 421 E 73rd St between First and York Aves (212-249-9144). Subway: 6 to 77th St. Mention Mother's Day when booking a basic manicure and pedicure package ($50) at this luxe nail salon and get a fancy upgrade. For example, during the Flower Petal Float (usually $68), you'll soak your feet in a basin filled with rose petals and get an exfoliating scrub up to your knees.