What do Mark and Sue do about eating on the day?
As they will have been with you all day Mark and Sue are usually ready to eat when you go in for your meal. Depending on the venue they would make their own arrangements to eat in a room nearby, but otherwise they would step out of the wedding temporarily and arrange and pay for a meal, themselves. They do need to be on hand in order to cover the commencement of the speeches where these fall at the end of the wedding breakfast.