Showed up, having booked it through Treatwell earlier in the day, only to find that there was no booking. The staff said they had been "so busy, and hadn't checked any bookings coming in" and now it was fully booked. Here's a tip for you: If you sign up to be part of a service like Treatwell, make the time to check incoming bookings during the day. They suggested I'd call before. What's the point of booking through a website then?