Did a quick search for you.
You may want to check out Powerhouse Berlin. It might be more of a bodybuilding place than one for powerlifting or strongman but at least you should only meet people there who take their training seriously.
Or you could try Mc-Fit. They should be well equipped, then again you may have some frustrating encounters with guys curling in the squat rack.
210 kg SQ, 135 kg Bench, 260 kg DL
Long Term Goals:
@ 75 kg: SQ - 252,5 kg, SQ w/ Wraps - 282,5 kg, DL - 307,5 kg, Total (w/o Wraps) - 710, Total (w/ Wraps) 712,5 kg
@ 82,5 kg: SQ - 275 kg, SQ w/ Wraps - 277,5 kg, Total (w/ and w/o Wraps) - 772,5 kg
Team Insanity - The Laws of Physics are Merely a Suggestion