Taxi dancers, in the context of dance festivals and events, are experienced dancers who are hired to dance with other attendees who may not have a dance partner or who want to improve their dancing skills. The term "taxi" in this context refers to providing a service to transport or accompany someone, not necessarily in a vehicle, but on the dance floor. At the Las Vegas Tango Festival, the Taxi Dancer service is likely being offered to enhance the experience of participants who may be attending the festival alone or without a dance partner. These professional dancers are there to socialize and dance with attendees who are looking for a partner. It's a great way for participants to meet new people, enjoy the event to the fullest, and improve their tango skills by dancing with experienced partners. The specific details of the Taxi Dancer service, such as the cost, duration of dance sessions, and how to book a taxi dancer, would depend on the organization and arrangements made by the festival organizers. If you are interested in taking advantage of this service, you should check the Las Vegas Tango Festival's official website or contact their organizers directly for more information and to see if the service is still being offered.