Kann irgendjemand versuchen, diesen Aufkleber zu übersetzen/erklären??

No 20 Bucks for a “slide” of beer. Reduce beer prices!

A Zwanni means a 20 Euro note. ‘ne Rutsche (“a slide”) is probably a local amount of beer. On a typical villiage party you are not going to the bar to get 1 beer. You get for example 10 beers on a sort of carrier and share them. Such beer carriers have different regional names, but this one is a “Rutsche.”