At the Musjid where I attend (in New York), feasting takes place at the time of iftaar.

Answer

You don't need the permission of vile gluttons who eat like animals and waste like devils. They are brothers of the shayaateen according to the Qur'aan Majeed. If the people of the Musjid are committing the heinous and major sin of throwing so much food in the garbage, then you may give the food to the non-Muslim neighbour. May Allah Ta'ala guide those who are displaying so much satanic ingratitude to Allah Ta'ala for the bounty of food. It is haraam to devour so gluttonously at the time of iftaar as you have described. The Sunnah way is to break the fast with a couple of dates or water, then to immediately begin Maghrib Salaat.