My experience, the outcome of guests will be lesser than expected. If i anticipated the outcome, i would have confirmed lesser tables with hotel.. meaning.. if i have 236 guests, i will confirm 23 tables of 10 pax + 1 spare. Becos sure have ppl last min not coming and u can allocate the remaining 6 guests to these tables..if u allocate the 6 pax as 11th pax, u will end up paying more... for mine, end up i only paid 23tables + 1 pax...