Blow Up Hall 50/50 is a complex which includes a restaurant, art gallery and hotel. It commissioned its hallmark installation to be designed by crucial artist, Rafael Lozano-Hemmer who is one of the top digital artists in the world. He is a BAFTA prize-winner and his work has appeared in New York and the Tate Modern London. There is no reception or door numbers. Here, guests book, locate and open their rooms with iPhones that use digital recognition technology to unlock doors. Luckily the massages on offer are still done by trained humans in the old fashioned way. Robot design hasn’t go to the stage where they can give a good massage, their hands are too cold. You can also relax in the large steam room. The complex also includes boutique shopping in a nearby converted brewery. The restaurant is top class and the bar is resplendent in purple and geometric finery.