What On Earth?

I discovered an odd knob* in my hotel bathroom.  I turned it and this red light switched on.  I have no idea what it's for - were Radisson Hotels well known for offering darkrooms to their customers?

Last day of the conference - a couple of really good presentations to round off a good three days.

The trip home was not as relaxed as I would have liked.  Deutsche Bahn 
really do like to mess with people who like being punctual.  Instead of 25 minutes to go from platform 6 to platform 24, I had 6 minutes and thousands of people incapable of watching what they're doing between me and my train.  Surprisingly there were no casualties.

*Stop sniggering Parsones