The Jewish Center of Teaneck’s Tikkun Leil Shavuot starts with a discussion by Rabbi Daniel Fridman, “Like One Man with One Heart: The Sources of Jewish Unity,” 11-11:45 p.m. Light refreshments. At midnight, Yigal Gross discusses “Negotiating Beliefs: How to Achieve Jewish Communal Debate Where Everyone Wins.” 70 Sterling Place. (201) 833-0515.