Mickey’s Tavern in Chicago’s Bucktown neighborhood died a few years ago. One of its beloved regulars died in December. I first met Dr. Pelz at Mickey’s when I moved to the neighborhood. It was my first night on the block and I headed over to the dive bar on Medill and Leavitt before my bags were unpacked. It may have been Dr. Pelz who brought my first beer. It’s hard to tell. There was more than one free beer coming my way from longtime patrons who I would come to know well over the next few years. Bill Pelz was his name but to me he’ll always be Dr. Pelz. Dr. Pelz, a history professor at Elgin Community College, hosted an annual Christmas party.…