People tend to enter the photobooth in groups or as couples. Thus, at the very minimum you would need 50 photobooth sessions to get everyone through. Our photobooth on average does about 50 sessions an hour. However, many people like to go in again and again, and there is always at least one camera hog. So it may take a a little longer to get everyone through. You’ll have to use your best judgement based on your guests and event to determine how long you’d like a photobooth for.