Halloween weekend in Berlin: which bars actually do it well (without €18 cocktails)?

Halloween falls on a Saturday this year, so every Kneipe from Neukölln to Prenzlberg will be packed with fake blood. I'm after a bar with a proper themed drink or decent decorations, not a club with a €20 cover and a queue. Where are you going this weekend, and what spooky drink are you still thinking about from last year?