My mom is pretty open about having open seating at the reception, which is on the smaller side roughly 80 people. I am so determined to have at least assigned table, to help organize people and limit the number of extra tables we would need with an open floor plan. I know that since she is paying she has say, but I can't help feel that this is just a cluster waiting to happen. What are some of the perks of open seating/ reserved seating??