Want a seat at this synagogue for the High Holidays? It said that in order to secure seats for High Holidays services — the holiest days of the Jewish year — you must show proof of voter registration. The synagogue's letter comes weeks before New York City's mayoral election on November 4. Nor does it tell congregants what party to register with, or who to vote for or against. Shaare Zion is the largest Syrian synagogue in New York City, and an important and influential part of the Sephardic Jewish community.