Many times the number of diners you are given will not be easily divisible by the number of servings per table (usually 6 or 8). This can create a potential problem when it comes to serving your food at feast. So please be sure to find out from the individual who is hosting the event how many diner's are expected to sit "per table" before you discuss budget. Most SCA feasts will expect tables of 8 diners,so the numbers of diners you will be expecting to feed should be easily divisible by 8.
Expected number of diners: 60
Number of seats per table: 8