The Central European wasp is a yellowjacket, Vespula germanica. It is very attracted to sweets and foods especially in the autumn. However, it does not usually sting unless there's a reason, such as you're trying to sit on it.
I myself have had zero stings of any bee or wasp in my life so I prefer to gently coax them away from my plate. Some people are absolutely terrified about them though so "just let them be" rarely seems to be good advice.
https://en.wikipedia.org/wiki/Vespula_germanica
Edit: actually I don't know which one is more common, Vespula germanica or Vespula vulgaris. I wouldn't be able to differentiate between them.