Unfortunately, the owner wasn't there at the moment, so I talked to the sales girl and asked if she could have him write the names down for me when he got in. I gave her one of my Omissions+Revelations books in case he was interested in seeing my own paintings, and told her I would stop by the following day.
So today during my lunch break I went back and she had the list of artist's names ready for me (all four live and work in Hamburg). She also let me that the store owner had liked my work and that he wanted to take me to over to meet one of the artists some time before I had to go back to Chicago. Sadly, I explained that this was my last day, and that I would have loved to go if I were staying longer. I mentioned that I might be coming back here to Hamburg to live, so I might be able to take him up on the offer in the not-too-distant future. We'll see!