Stag do in Berlin

Am off to Berlin in early May , so am looking for suggestions for evening entertainment - you know the sort of thing - 11 pi$$ed up, middle aged men, looking for something to make them forget the loneliness of being away from home, (with the exception of myself of course).

Have booked a drinking tour for the Friday and Hertha Berlin match tkts for the Sat afternoon, so just need something to round weekend off.

cheers