Watch the gossiping wives in front of Corinna's house (the summoner). You hear 2 names (Yavuz/Magdalena).
1. speak to the 2 guys looking for fun. They're in the Ducal Inn in a room, later on in the bar.
2. Do what Faile wrote
3. Go to Leptin
4. After your visit go to the 2 fun guys again