Single in Chicago To the Editor: Regarding "Single in Chicago" (July 8): I've been stuck here in New York for the last 30 years, and I miss Chicago every day. I used to have a small sailboat moored in Burnham Harbor next to McCormick Place, and I still treasure those warm summer nights of sailing, the buildings" lights in the background. Portillo's hot dogs and Pizzeria Due. The Art Institute, the Chicago Symphony Orchestra, and, of course, Da Bears. To the Editor: To stay in the Loop and call that Chicago is simply unacceptable. Your experience is equivalent to me traveling to New York City, seeing only Times Square and judging the city accordingly.