John F. Kennedy, Jr. and his wife Carolyn Bessette-Kennedy. Credit: Tyler Mallory/Liaison/Getty Images Few couples have occupied New York’s cultural imagination quite like John F. Kennedy Jr. and Carolyn Bessette—and FX’s American Love Story has reignited that fascination for a new generation. The series not only revisits their romance, but also resurrects a distinctly 1990s Manhattan. On-screen, we see their rituals: martinis at The Odeon, pancakes at Bubby’s, long walks along the then-gritty waterfront. Having lived in Tribeca for the past decade, I’ve watched fans retrace those steps, lingering outside former haunts in search of a vanished era. Some of the places they loved still stand. Others have changed. And if their Tribeca story had continued, there are a few new addresses that feel unmistakably JFK-and-Carolyn approved. The Odeon A downtown institution since the 1980s, The Odeon was one of the couple’s go-to spots.…