459 W 15th St between Ninth and Tenth Aves. Subway: A, C, E 14th St; L to Eighth Ave. This subscription beauty-sample service debuts a Fashion Week pop-up, open to the public for the first time. Book an appointment online for makeup, hair and nail services ($15 each), and nab a $15 credit toward full-size products from brands such as Stila, Jouer and Color Club. You’ll also be able to build your own Birchbox for $15 (or free with a $50 full-size product purchase) from the beauty sample wall. Stock up on Jouer lip enhancer ($14), Oribe texturizing hairspray ($39) and Benefit volume-boosting mascara ($23).