Atmosphere models are hired by the producers of themed events to enhance the atmosphere or ambience of their event. They are usually dressed in costumes exemplifying the theme of the event and are often placed strategically in various locations around the venue. It is common for event guests to have their picture taken with atmosphere models. For example, if someone is throwing a "Brazilian Day" celebration, they would hire models dressed in samba costumes and headdresses to stand or walk around the party.