The foreign ministry says that it has enlisted more than 200 volunteers to work at the summit that is expected to attract 32 visiting heads of state and their aides.
This is the third annual summit of the Community of Latin American and Caribbean States, and Costa Rica holds a one-year term as president.
The volunteers are mainly university students, the ministry said. They met with Manuel A. González, the foreign minster, Thursday.
The ministry also said that Glenda Umaña, the former U.S. television presenter, would be the moderator.