By Nikki Ekstein
Bloomberg News
Call it foliage season, shoulder season, Q3, or plain old fall: It’s the best time of year for big cities and big adventures, and it’s coming up fast. In any constantly evolving metropolis, this is when restaurant rows and museum miles flash with glitzy new openings and exhibits, all of them ready to capture a local population that’s spent the last few months decamped somewhere else.
