Unless you're serving only cocktails and hors d'oeuvres, make it easier on your guests by providing assigned tables, even if you choose not to do place cards. Some think open seating will make the reception feel fun and relaxed, but trust me - it's only a myth.
If you leave it to chance, you run the risk of some guests dinning by themselves or with people they don't know. You will even have guests who will pull extra chairs over to their table so all their pals can sit together.
Both scenarios are likely to disrupt the flow of your celebration.
