I know the rule of thumb is to expect that 20% of the guest list will not come... however I am in the process of finding a reception site and my guest is 100. Should I tell the reception hall 100 or 80? The downpayment to book the reception hall is based on the amount of guests. If the guests go over what I estimate...the room might be too small....if the guests are less than what I estimate...the hotel will make me pay more because they have a minimum $$ requirement per room. I had no clue this is sooo hard. Also my fiance''s family and friends are from another country. He wants to invite all these people but I DOUBT they will fly all the way here, but if they do there might be too many guests. A lot of my guests are scattered around the US so I don''t know if they are willing to travel to come to my wedding.... I have no clue how I should estimate the amount of guests that will be there. Help