I booked a 30 minute slot early in the morning via whatsapp and they confirmed it.
About 9 hours later I walked in at the agreed time. There was no one at reception, but a 5/10 woman appeared a moment later. As soon as she saw me she shouted for the manager and they argued in Chinese while I stood there. I said I had a booking, they asked for my name and time, I told them and show them the whatsapp conversation. Seeing the manager oily hands, I realised some poor lad was now lying there waiting for the rubbing to continue.
Finally the manager said they were fully booked and to please come back in 30 minutes. I left with the quiet relief of someone who just dodged what looked like a bad purchase.