Germany: Any reason to celebrate in Monheim am Rhein, Cologne, and Düsseldorf

Christian let me know that I had to order the right beer for the city I was in. In Düsseldorf, they brew Alt, so that’s what they drink. In Cologne, they brew and drink Kölsch. I would be frowned upon if I ordered a beer in the wrong city. Those fortunate enough to live in Monheim am Rhein could order either, when in Monheim, of course.