Being in a popup space it was only ever intended to be there temporarily. It was advertising itself to be a relaxation space I think, presumably they were selling something (refreshments?) to maybe they charged to go in. I don't know, I only walked past it, didn't pay significant amounts of attention and didn't go in. There is a big effort to try and make Old Street more like Shoreditch, which generally means paying through the nose for something you most likely don't need and could get for much better value elsewhere without all the surrounding pretentiousness (sorry, it's really not my scene!).