To host a successful expo event involving almost any area of interest, it is completely up to you whether there is an admission charge or not. Most expo events do charge a small fee which helps to cover the rental of the building as well as paying the vendors. The admission fee does not have to be a high amount as with many expos there are lots of people who come. The smaller the fee, the more people you will attract. If the expo event you are holding is centered on weddings or other couples related events it would be a good idea to charge for the man and let the woman get in free. This will entice more people to come which allows you to make more money. Expo events that involve a community service event could offer a canned food or other non-perishable item as an entrance fee. Most fees, if they are charged, are normally between five and ten dollars per person. Depending on how large the expo area you are renting is and the number of vendors that you have to pay involves will set the price of how much you charge. An admission fee is a good idea for most expo events.