Cologne Germany food and fun?

Question

My friends and I are going to Cologne, Germany and looking for what to do there, eat, party, ect, sights. We will be on business most days but want to have fun too.

Answer 1

This has everything you need,  http://www.10best.com/Cologne/index.html

Just don't go during the first week of july,  they whole place is tied up suporting some festival.