I had the privilege of taking a darkroom-refresher course with Astrid who runs and owns Galerie…read moreMagenta. She was patient and explained the processes with clarity. She always made me feel incredibly calm and was welcoming if I had questions or was confused about something. I researched a couple of darkrooms in Berlin, but as an American, I was seeking someone who could give a tutorial in English; and so, I came across her site which is in both German and English. http://www.lueders-photoworks.de/ . It's a clean and organized darkroom with all materials handy at a very very reasonable price 6 euro/hour. Another positive is that you don't have to buy the chemicals. It's provided, and so this definitely reduces the cost and allows photographers who only need to use the lab for a couple of hours or days but don't have the resources to buy/get the chemicals to utilize the lab. You can also purchase dark room paper at the lab if you don't have any. Highly recommended!