The most charming and romantic film of the year is the lovely "Southside With You," the story of the First Couple's first date. Michelle Robinson was recently out of law school herself when she was asked to be mentor/supervisor of a law student named Barack Obama. She agreed to go with him to a community meeting and insisted that it was not a date. But it ended with their first kiss, at a Baskin-Robbins that now has a plaque commemorating the historic event. "Southside With You," like "Before...