[Ceremony Schedule] Blessing / Meal Served [Suggested Timeline] 07:35 PM [Schedule of Events] 
If you want to say grace prior to your meal, let your master of ceremonies or DJ know who will give it so they can introduce them. Your DJ should coordinate with one another as to who will release tables and how it should be done. Ask your DJ if they have any special things they do to interact with the crowd and release tables.