Another month, another concert on the River. This time it was Henry Brun’s Latin Jazz Orchestra performing in front of the languorous bend that forms our perfect shaded amphitheater. Some of the fainthearted assumed the mercury hitting 100 degrees would mean incineration for the audience. They were very wrong: the breeze picked up just before the concert, and with the aid of whatever was in everyone’s ice buckets and coolers, the atmosphere was refreshing and the occasion was congenial.