What is the best 'party city' contained by Germany for a single guy...any counsel would be appreciated!?

I've heard it was(in instruct of seriousness!):
1.)Cologne
2.)Hamburg
3.)Munich

Answers: Munich, Cologne, Hamburg and don't miss out Berlin!

Different regions produce different kinds of entertainment and you also stipulation to know what you really want :-)

Berlin is where the party's at! 1- Munich.

2- Cologne.

3- Hamburg.

:-)