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This place is no longer dedicated to the Ramones. Most of the interesting stuff seen on the photos in the older reviews here are gone! There's only the leather jacket, the jeans and some letters and an original handwritten lyrics on exhibition. (I don't think dozens of cassettes and single vinyls are really interesting to see.) Other than that it is now a neat local pub sort of thing - staff is superb, the food is good enough.
Be aware that it is right in the middle of one of Berlin's less cosy neighbourhoods. After dark, take the usual precautions - stick to the main roads, walk with confidence, avoid groups of young males.