Hi! Cologne (Köln) is one of Germany's most beautiful cities with an active gay scene. If money is no object and you like interesting design hotels, check out the Hotel Im Wasserturm at the following link:

http://www.hotel-im-wasserturm.de/

A useful link to information on Gay things in Cologne can be found at: (Sorry only in German! I couldn't find an english page! Maybe you can use http://dict.leo.org/ to help you translate some of it)

http://www.gaylonia.de/

There is a scene link on this site that lists all of the bars, discos, etc. (at least you can get some of the names) Don't miss a tour of the Dom (cathedral) and the great shopping.