Strippers in Cologne - bring the strip club to you!
Why go to the club when you bring it right to your place? This can potentially be a great suprise for the stag in your accomodation. You can call the stripper and she will come to your place - all she needs is a place to change, and something to play music on. After she performs a sizzling hot strip show, you may if you're lucky, get a nice goodbye in the form of a photo (make sure you don't show the missus!).
This can be a nice suprise before or after you hit the town!