Any good clubs in Berlin?

[midUKhole]

Hi

I'm taking my wife to Berlin next February. Does anyone know any good swinger or sex clubs that would be open there mid -week where there is a good atmosphere (music /dance wise) and non-pushy attitude? BDSM environments are a plus.

I need somewhere with no expectations. She's more likely to go in for music and dancing than just sex, but I'm hoping that once inside she'll relax and let herself go a little bit.