Translation of mistress in German

When we left the stadium after the game there were plenty of people on the streets. The neighbors opened their windows to sell grilled meat and the entire street smelled of meat and smoke.
The name of the agency was Handspan and they were the first ones in the country that worked under ISO 9001:2000 quality management. That was pretty convincing especially after our horrible experience the day earlier.
There was an extra seat available (the last one apparently). We were so glad. 45 minutes later we sat in the place, eighty percent of the plane was empty. They really need to update their system.