Expires 4 months after purchase. Limit 1 per person, may buy 1 additional as gift. Booking required by phone on 0208 841 3300; provide coupon code. 48-hour cancellation policy. Must be 18 or older. Valid Mon 10am-6pm, Tue 10am-8pm, Wed 9.30am-6.30pm, Sat 9am-12pm. Must arrive at least 15 minutes before the appointment. Present Groupon on arrival. Valid for women only.