A 2015 study, citing sentiment analysis of social media posts by tourists, rated Chicago as the most tourist-friendly city in the US. Now, I'm sure many people would argue for their city, but my recent two-day business trip to the Windy City provided two great examples of strangers coming to my aquatic aid. I landed on a Thursday afternoon and had a very short time window in which to fit in a workout. I was staying in the trendy River North area at a Hyatt Place that had a smallish gym, but no pool. I knew I could pay an exorbitant daily fee and drop into the nearby East Bank club, where I had swum in their very nice pool back in December of 2014, but I both wanted to conserve some cash a