In the location's words:

The Iron Cocktail Lounge is located right in the heart of what is probably Cologne's most colorful nightlife district, near Rudolfplatz.
Our principle is to create a meeting place - open for communication, celebration and cultivated drinking pleasure.
A convivial and lively atmosphere is our priority. We make it our mission to revive tried-and-tested cocktail classics and develop original recipes - in tune with the times and in harmony with nature.
Probably the biggest challenge here is the expectation we place on ourselves.
Our inspiration is our guests - so let our bar team inspire you!
We warmly welcome you.